{"title":"3D printed reef tank accessories","description":"\u003cp\u003eHarry designs these 3D printed parts to make a reef tank tidier and easier to run. There are magnetic frag racks, nori and butterfly feeders, copepod pod hotels for Maxspect media, and a mount for Neptune and Red Sea gear. Magnets are sealed in bonded plastic capsules, and the racks and holders come in 5 colours. Harry also builds custom parts to your measurements.\u003c\/p\u003e","products":[{"product_id":"neptune-afs-mount-red-sea-pendant","title":"Neptune AFS mount for Red Sea ReefLED pendant, 3D printed","description":"\u003ch2\u003eHow do I fit a Neptune AFS inside a Red Sea ReefLED pendant?\u003c\/h2\u003e\n\u003cp\u003eThe mount holds the Neptune AFS auto feeder inside the pendant, so the feeder sits up with the light and not somewhere else around the tank. The photos show the mount empty from above, with the AFS seated in it, and fitted in a pendant.\u003c\/p\u003e\n\u003cp\u003eWe have not listed measurements for the mount. Look at the photos against your own pendant and feeder, or message us before you order.\u003c\/p\u003e\n\u003ch2\u003eCan I move the feeder around inside the pendant?\u003c\/h2\u003e\n\u003cp\u003eYes. Like the ReefLED trays, the mount slides side to side within the pendant. That lets you set the feeder where you want the food to go.\u003c\/p\u003e\n\u003ch2\u003eDoes it fit my pendant?\u003c\/h2\u003e\n\u003cp\u003eThe Red Sea ReefLED pendant and the Neptune AFS are the pairing it is made for. We do not say it fits other pendants or other feeders.\u003c\/p\u003e\n\u003cp\u003eNeed a mount for something else? Ask about \u003ca href=\"\/pages\/custom-3d-printing\"\u003ecustom 3D printing\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eIs it an official Neptune or Red Sea part?\u003c\/h2\u003e\n\u003cp\u003eNo. Marine Spec is an independent maker. Neptune, Red Sea and ReefLED are names of other companies and products, used here only to say what this fits. This mount is designed and 3D printed by us.\u003c\/p\u003e\n\u003ch2\u003eWhere can I see more 3D printed parts?\u003c\/h2\u003e\n\u003cp\u003eBrowse all of our \u003ca href=\"\/collections\/3d-printed-reef-accessories\"\u003e3D printed reef accessories\u003c\/a\u003e.\u003c\/p\u003e","brand":"Marine Spec","offers":[{"title":"Default Title","offer_id":59905992589657,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/files\/ac00ac_cc11a2bdf06d489484d62131ad86a161.png?v=1792090218"},{"product_id":"fragdoc-frag-plug-dock","title":"FragDoc frag plug holder for rockwork, packs of 3, 5 or 10","description":"\u003ch2\u003eHow do I attach a frag plug holder to rock?\u003c\/h2\u003e\n\u003cp\u003eFix the base to the rock with reef safe putty or glue. Once it has set, the plug slides in and can be lifted out again at any time.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eGlue or putty the base to your rock.\u003c\/li\u003e\n\u003cli\u003eSlide the plug into the dock.\u003c\/li\u003e\n\u003cli\u003eLift the plug out when you want to remove, swap or rotate the frag.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eHow big is the FragDoc?\u003c\/h2\u003e\n\u003cp\u003eEach dock is 18.5mm tall and 15.5mm across. It is sized for a snug fit around the plug, and the small footprint keeps it from taking over the rockwork.\u003c\/p\u003e\n\u003ch2\u003eCan I remove a coral later?\u003c\/h2\u003e\n\u003cp\u003eYes, and that is what it is for. The coral stays on its plug, and the plug comes out of the dock. The mount stays on the rock, so you move the frag without moving the hardware.\u003c\/p\u003e\n\u003cp\u003eIt suits reefers fragging for fun and anyone growing coral to sell.\u003c\/p\u003e\n\u003ch2\u003eAre plugs included, and which ones fit?\u003c\/h2\u003e\n\u003cp\u003ePlugs are not included. The FragDoc is made for our \u003ca href=\"\/products\/black-coral-frag-plugs\"\u003eblack frag plugs\u003c\/a\u003e, in round or square tops, and they appear in some photos only to show the fit.\u003c\/p\u003e\n\u003cp\u003eBoth parts are in the \u003ca href=\"\/collections\/frag-plugs-and-docks\"\u003efrag plugs and docks\u003c\/a\u003e range. For corals that need a rack first, see the \u003ca href=\"\/products\/magnetic-frag-rack\"\u003emagnetic frag rack\u003c\/a\u003e, or read \u003ca href=\"\/blogs\/guides\/what-is-a-frag-rack\"\u003ewhat a frag rack is\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eWhich pack size?\u003c\/h2\u003e\n\u003cp\u003eDocks come in packs of 3, 5 or 10.\u003c\/p\u003e","brand":"Marine Spec","offers":[{"title":"3","offer_id":59905992687961,"sku":null,"price":4.99,"currency_code":"GBP","in_stock":true},{"title":"5","offer_id":59905992720729,"sku":null,"price":7.49,"currency_code":"GBP","in_stock":true},{"title":"10","offer_id":59905992753497,"sku":null,"price":13.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/files\/ac00ac_ccf2ba016d304fb3a826c2286d2f6ba7.png?v=1792090219"},{"product_id":"black-coral-frag-plugs","title":"Black frag plugs, 25mm round or 27mm square, packs of 5 to 20","description":"\u003ch2\u003eHow big is a frag plug?\u003c\/h2\u003e\n\u003cp\u003eYou get 2 shapes. The round plug is 25mm across the top and the square plug is 27mm across the top. Both are 20mm tall with the stem on.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eShape\u003c\/th\u003e\n\u003cth\u003eTop\u003c\/th\u003e\n\u003cth\u003eHeight with stem\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRound\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSquare\u003c\/td\u003e\n\u003ctd\u003e27mm\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eDo I have to cut the stem off?\u003c\/h2\u003e\n\u003cp\u003eNo. The stem is fully detachable, so there is no trimming and no bone cutters. Take it off and the frag sits flat, or leave it on and the frag sits on a stem. You choose for each one.\u003c\/p\u003e\n\u003ch2\u003eWill they sink?\u003c\/h2\u003e\n\u003cp\u003eYes. Some 3D printed plugs float or hover. Ours are designed with enough density to sink, so a plug stays where you put it while you line up your frags.\u003c\/p\u003e\n\u003ch2\u003eDo they fit a frag dock?\u003c\/h2\u003e\n\u003cp\u003eThey do. The plugs are compatible with the \u003ca href=\"\/products\/fragdoc-frag-plug-dock\"\u003eFragDoc frag plug holder\u003c\/a\u003e, which glues to your rockwork. The FragDoc is sold separately and appears in some of the photos to show how the pair fits.\u003c\/p\u003e\n\u003ch2\u003eAre black plugs better than white for SPS?\u003c\/h2\u003e\n\u003cp\u003eThat is a call about looks. Black blends into most aquascapes, where bright white plugs stand out. The textured top and central divot give glue or putty something to grip, which is why we say they suit SPS frags.\u003c\/p\u003e\n\u003cp\u003eLooking for somewhere to hold your frags? See the \u003ca href=\"\/collections\/frag-plugs-and-docks\"\u003efrag plugs and docks\u003c\/a\u003e range, or browse \u003ca href=\"\/collections\/frag-racks\"\u003efrag racks\u003c\/a\u003e. New to all this? Read \u003ca href=\"\/blogs\/guides\/what-is-a-frag-rack\"\u003ewhat a frag rack is\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eWhich pack size?\u003c\/h2\u003e\n\u003cp\u003ePacks come in 5, 10 or 20. Pick by how many frags you want to mount in one go.\u003c\/p\u003e","brand":"Marine Spec","offers":[{"title":"Round \/ 5","offer_id":59905993441625,"sku":null,"price":3.49,"currency_code":"GBP","in_stock":true},{"title":"Round \/ 10","offer_id":59905993474393,"sku":null,"price":6.49,"currency_code":"GBP","in_stock":true},{"title":"Round \/ 20","offer_id":59905993507161,"sku":null,"price":11.49,"currency_code":"GBP","in_stock":true},{"title":"Square \/ 5","offer_id":59905993539929,"sku":null,"price":3.49,"currency_code":"GBP","in_stock":true},{"title":"Square \/ 10","offer_id":59905993572697,"sku":null,"price":6.49,"currency_code":"GBP","in_stock":true},{"title":"Square \/ 20","offer_id":59905993605465,"sku":null,"price":11.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/files\/ac00ac_d62d92e4ce7c4a739108490a35c510b3.png?v=1792090218"},{"product_id":"magnetic-nori-feeder","title":"Magnetic nori feeder for tangs, Standard or Strong magnet","description":"\u003ch2\u003eDoes a magnetic nori feeder stop nori floating around the tank?\u003c\/h2\u003e\n\u003cp\u003eIt helps. With the tray closed, a feeding grid holds the algae in place and fish graze through the openings. That helps stop large pieces breaking free and drifting about the aquarium.\u003c\/p\u003e\n\u003ch2\u003eHow do I load it?\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eSlide the tray open.\u003c\/li\u003e\n\u003cli\u003ePlace the nori inside.\u003c\/li\u003e\n\u003cli\u003eClose the tray.\u003c\/li\u003e\n\u003cli\u003ePut the feeder back in the aquarium.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eWhat can I put in it besides nori?\u003c\/h2\u003e\n\u003cp\u003eSheets of nori or other algae based foods, for herbivorous marine fish such as tangs. How often to offer it is a separate question, and we cover it in \u003ca href=\"\/blogs\/guides\/how-often-to-feed-nori-to-tangs\"\u003ehow often to feed nori to tangs\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eWeighing it against a simple clip? Read \u003ca href=\"\/blogs\/guides\/nori-clip-vs-nori-feeder\"\u003enori clip vs nori feeder\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eWhat glass thickness does it hold on to?\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMagnet\u003c\/th\u003e\n\u003cth\u003eSuits glass up to\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e14mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStrong\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe feeder is not rated for glass thicker than 19mm. Our guide helps you work out \u003ca href=\"\/blogs\/guides\/which-magnet-strength-for-your-glass\"\u003ewhich magnet strength suits your glass\u003c\/a\u003e. At 13mm thick, the feeder itself is a slim, flat shape.\u003c\/p\u003e\n\u003ch2\u003eCan the magnet go in saltwater?\u003c\/h2\u003e\n\u003cp\u003eThe magnets are sealed inside bonded plastic, not printed plastic, in a housing that is permanently welded to make it watertight. That housing is then secured within the printed feeder. Read more in \u003ca href=\"\/blogs\/guides\/are-magnets-safe-in-a-reef-tank\"\u003eare magnets safe in a reef tank\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe outer magnet is for dry use only and is not waterproof.\u003c\/p\u003e\n\u003ch2\u003eOther magnetic parts to look at\u003c\/h2\u003e\n\u003cp\u003eFeeding a fussy fish? Try the \u003ca href=\"\/products\/magnetic-butterfly-feeder\"\u003emagnetic butterfly feeder\u003c\/a\u003e. Or see every \u003ca href=\"\/collections\/magnetic-feeders\"\u003emagnetic feeder\u003c\/a\u003e and the wider set of \u003ca href=\"\/collections\/magnetic-reef-accessories\"\u003emagnetic reef accessories\u003c\/a\u003e.\u003c\/p\u003e","brand":"Marine Spec","offers":[{"title":"Standard","offer_id":59905993638233,"sku":null,"price":28.99,"currency_code":"GBP","in_stock":true},{"title":"Strong","offer_id":59905993671001,"sku":null,"price":32.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/files\/ac00ac_42f46292e3cd4e09a8a4672a3cd48de6.png?v=1792090216"},{"product_id":"magnetic-butterfly-feeder","title":"Magnetic butterfly feeder for copperband butterflyfish","description":"\u003ch2\u003eHow do I feed a copperband butterflyfish that will not eat?\u003c\/h2\u003e\n\u003cp\u003ePut the food where the fish will look for it, and keep faster tank mates away from it. That is what this feeder does. No feeder can make a fish eat, but this one offers food in a controlled, targeted way.\u003c\/p\u003e\n\u003ch2\u003eWhat can I put in a target feeder?\u003c\/h2\u003e\n\u003cp\u003eFrozen cubes, mussel, mastic or other suitable foods. Take off the front cap, place the food inside and refit the cap before returning the feeder to the aquarium.\u003c\/p\u003e\n\u003ch2\u003eWhat is the vent hole for?\u003c\/h2\u003e\n\u003cp\u003eA small hole at the top lets trapped air out. It also lets you syringe in defrosted frozen food, so you can top up without taking the cap off.\u003c\/p\u003e\n\u003ch2\u003eWill faster fish steal the food?\u003c\/h2\u003e\n\u003cp\u003eThe front openings are sized to suit butterflyfish mouth shapes, which helps reduce food theft from faster or more aggressive tank mates. It is not a guarantee, so watch how your own fish behave around it.\u003c\/p\u003e\n\u003cp\u003eFeeding another fussy eater? Read \u003ca href=\"\/blogs\/guides\/what-to-feed-a-mandarin-goby\"\u003ewhat to feed a mandarin goby\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eWhich magnet fits my glass?\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMagnet\u003c\/th\u003e\n\u003cth\u003eSuits glass up to\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e14mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStrong\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe feeder measures L35mm x W36.5mm x H35mm. Not sure of your glass? See \u003ca href=\"\/blogs\/guides\/which-magnet-strength-for-your-glass\"\u003ewhich magnet strength suits your glass\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eWhat about saltwater and the magnet?\u003c\/h2\u003e\n\u003cp\u003eOurs spent 2 years in refinement. The magnets are sealed inside bonded plastic, not printed plastic, in a permanently welded housing that is secured within the printed feeder. The outer magnet is for dry use only and is not waterproof. More in \u003ca href=\"\/blogs\/guides\/are-magnets-safe-in-a-reef-tank\"\u003eare magnets safe in a reef tank\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eMore feeders\u003c\/h2\u003e\n\u003cp\u003eFor tangs and other grazers there is the \u003ca href=\"\/products\/magnetic-nori-feeder\"\u003emagnetic nori feeder\u003c\/a\u003e. Browse all \u003ca href=\"\/collections\/magnetic-feeders\"\u003emagnetic feeders\u003c\/a\u003e or the full \u003ca href=\"\/collections\/magnetic-reef-accessories\"\u003emagnetic reef accessories\u003c\/a\u003e range.\u003c\/p\u003e","brand":"Marine Spec","offers":[{"title":"Standard","offer_id":59905993834841,"sku":null,"price":27.99,"currency_code":"GBP","in_stock":true},{"title":"Strong","offer_id":59905993867609,"sku":null,"price":31.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/files\/ac00ac_664948a49b7b45399f6045f31106b11c.png?v=1792090219"},{"product_id":"maxspect-bio-sphere-holder-pod-hotel","title":"Maxspect bio sphere holder and copepod hotel V2, holds 1kg","description":"\u003cp\u003eThis holder is built around 1kg of Maxspect Nano Tech bio spheres. The spheres sit in an open frame so water moves through all of them, and a copepod hotel fills the space underneath.\u003c\/p\u003e\n\u003ch2\u003eWhat holds Maxspect Nano Tech bio spheres?\u003c\/h2\u003e\n\u003cp\u003eThis holder does, up to 1kg. Of our 3 Maxspect holders it is the only one designed around spheres rather than blocks, so if your media is spheres, this is the version to choose.\u003c\/p\u003e\n\u003cp\u003eThe spheres are not included. You buy them separately.\u003c\/p\u003e\n\u003ch2\u003eHow do the flow and the pod hotel work together?\u003c\/h2\u003e\n\u003cp\u003eThe frame is open, so water passes through the spheres instead of around them. Underneath is the pod hotel, a sheltered space where copepods and amphipods can multiply away from fish.\u003c\/p\u003e\n\u003cp\u003eOnce a population is established, those pods may feed on bacteria and detritus from the spheres above. That is why we treat the holder and the media as a pair.\u003c\/p\u003e\n\u003ch2\u003eHow tall is the bio sphere holder?\u003c\/h2\u003e\n\u003cp\u003eIt is 83mm by 83mm and 191.5mm high without the spheres loaded. That makes it the tallest of the 3, so measure the height you have before you order.\u003c\/p\u003e\n\u003ch2\u003eWhich colours does it come in?\u003c\/h2\u003e\n\u003cp\u003eThere are 5 to pick from: Midnight Black, Scarlet Red, Aqua Green, Clown Orange and Regal Blue. The photos also show a black and orange Special Edition finish.\u003c\/p\u003e\n\u003ch2\u003eIs it made by Maxspect?\u003c\/h2\u003e\n\u003cp\u003eMaxspect and Nano Tech are the names of another company's products. This holder is an independent accessory, designed and 3D printed by Marine Spec, and it is not made or endorsed by Maxspect.\u003c\/p\u003e\n\u003ch2\u003eStarting a pod population\u003c\/h2\u003e\n\u003cp\u003eNew to pod hotels? Read \u003ca href=\"\/blogs\/guides\/do-copepod-hotels-work\"\u003edo copepod hotels work\u003c\/a\u003e, then \u003ca href=\"\/blogs\/guides\/maxspect-bio-spheres-holder-sump\"\u003eMaxspect bio spheres and holders in a sump\u003c\/a\u003e. To seed the hotel we sell \u003ca href=\"\/products\/live-marine-copepods\"\u003elive marine copepods\u003c\/a\u003e and the \u003ca href=\"\/products\/live-nannochloropsis-phytoplankton\"\u003elive nannochloropsis phytoplankton\u003c\/a\u003e they are fed on.\u003c\/p\u003e\n\u003cp\u003eThe other 2 holders are the \u003ca href=\"\/products\/maxspect-bio-block-holder-pod-hotel\"\u003ebio block holder\u003c\/a\u003e and the \u003ca href=\"\/products\/maxspect-anaerobic-block-holder-pod-hotel\"\u003eanaerobic block holder\u003c\/a\u003e. All 3 sit in the \u003ca href=\"\/collections\/pod-hotels\"\u003epod hotels collection\u003c\/a\u003e.\u003c\/p\u003e","brand":"Marine Spec","offers":[{"title":"Midnight Black","offer_id":59905994228057,"sku":null,"price":23.99,"currency_code":"GBP","in_stock":true},{"title":"Scarlet Red","offer_id":59905994260825,"sku":null,"price":23.99,"currency_code":"GBP","in_stock":true},{"title":"Aqua Green","offer_id":59905994293593,"sku":null,"price":23.99,"currency_code":"GBP","in_stock":true},{"title":"Clown Orange","offer_id":59905994326361,"sku":null,"price":23.99,"currency_code":"GBP","in_stock":true},{"title":"Regal Blue","offer_id":59905994359129,"sku":null,"price":23.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/files\/ac00ac_fc973f22ca4a4432b8627f281eaf9c19.png?v=1792090236"},{"product_id":"maxspect-bio-block-holder-pod-hotel","title":"Maxspect bio block holder and pod hotel V2, holds 2 blocks","description":"\u003cp\u003eAt 36mm tall, this is the low, wide holder in our Maxspect range. It carries 2 Nano Tech bio blocks and leaves the space around them open to flow.\u003c\/p\u003e\n\u003ch2\u003eWhich holder fits Maxspect Nano Tech bio blocks?\u003c\/h2\u003e\n\u003cp\u003eThis one, with room for 2 blocks. The blocks are not included, so you buy them separately. If your media is spheres or anaerobic blocks, one of our other 2 holders is the better match.\u003c\/p\u003e\n\u003ch2\u003eHow big is the bio block holder?\u003c\/h2\u003e\n\u003cp\u003eWithout blocks it is 109mm long, 63mm wide and 36mm high. That low, wide shape takes far less height than the sphere holder, which stands 191.5mm, so it can go where a tall holder cannot.\u003c\/p\u003e\n\u003ch2\u003eCan pods really live in it?\u003c\/h2\u003e\n\u003cp\u003eThe holder gives copepods and amphipods a sheltered space while water flows through the blocks. We cannot promise a population in your tank. Once one is established, pods may feed on the bacteria and detritus that live in the blocks.\u003c\/p\u003e\n\u003ch2\u003eWhich colours can I choose?\u003c\/h2\u003e\n\u003cp\u003eThe same 5 as the other 2 holders. Each has its own photo on this page, and the gallery adds a black and orange Special Edition plus a group shot of 3 colours together.\u003c\/p\u003e\n\u003ch2\u003eIs it a Maxspect product?\u003c\/h2\u003e\n\u003cp\u003eNo. Maxspect and Nano Tech are another company's names, used here only to show which blocks fit. We design and 3D print this holder ourselves, and Maxspect does not make or endorse it.\u003c\/p\u003e\n\u003ch2\u003eWhere to go next\u003c\/h2\u003e\n\u003cp\u003eIf you are weighing up pod hotels, \u003ca href=\"\/blogs\/guides\/do-copepod-hotels-work\"\u003edo copepod hotels work\u003c\/a\u003e is the place to start. To get a population going, add \u003ca href=\"\/products\/live-marine-copepods\"\u003elive marine copepods\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eRunning spheres or anaerobic blocks instead? See the \u003ca href=\"\/products\/maxspect-bio-sphere-holder-pod-hotel\"\u003ebio sphere holder\u003c\/a\u003e and the \u003ca href=\"\/products\/maxspect-anaerobic-block-holder-pod-hotel\"\u003eanaerobic block holder\u003c\/a\u003e, or browse the whole \u003ca href=\"\/collections\/pod-hotels\"\u003epod hotels collection\u003c\/a\u003e.\u003c\/p\u003e","brand":"Marine Spec","offers":[{"title":"Midnight Black","offer_id":59905994457433,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true},{"title":"Scarlet Red","offer_id":59905994490201,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true},{"title":"Aqua Green","offer_id":59905994522969,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true},{"title":"Clown Orange","offer_id":59905994555737,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true},{"title":"Regal Blue","offer_id":59905994588505,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/files\/ac00ac_adbc1a3044214bf0ab5ba98a246d3016.png?v=1792090236"},{"product_id":"maxspect-anaerobic-block-holder-pod-hotel","title":"Maxspect anaerobic block holder and pod hotel V2, holds 2","description":"\u003cp\u003eThis is the slim one. It holds 2 Maxspect Nano Tech anaerobic blocks in the slimmest frame of our 3 Maxspect holders, with flow through the blocks and a safe place for copepods below.\u003c\/p\u003e\n\u003ch2\u003eIs there a holder for Maxspect Nano Tech anaerobic blocks?\u003c\/h2\u003e\n\u003cp\u003eYes, this one, made for 2 anaerobic blocks. If anaerobic blocks are your media, this is the holder to pick. The blocks are not included, so buy them separately.\u003c\/p\u003e\n\u003ch2\u003eHow big is the frame?\u003c\/h2\u003e\n\u003cp\u003eThe frame is 105mm long and 27.5mm high. That is the slimmest of our 3 Maxspect holders, and lower than even the bio block holder, which stands 36mm.\u003c\/p\u003e\n\u003cp\u003eWant the exact width before you order? Message Harry on WhatsApp and ask.\u003c\/p\u003e\n\u003ch2\u003eWill copepods breed in it?\u003c\/h2\u003e\n\u003cp\u003eThe design includes a sheltered space for amphipods and copepods, away from fish. We cannot promise it will work in your tank. Where a colony does build up, the pods may graze on the bacteria and detritus in the blocks.\u003c\/p\u003e\n\u003ch2\u003eColours and photos\u003c\/h2\u003e\n\u003cp\u003eThere are 5 colours, the same as our other Maxspect holders. The photos show the holder with 2 blocks resting on top, so you can see how they sit.\u003c\/p\u003e\n\u003ch2\u003eWho makes it?\u003c\/h2\u003e\n\u003cp\u003eMaxspect Nano Tech blocks are sold by Maxspect, not by us. The holder is our own design, 3D printed by Marine Spec as an independent accessory, and Maxspect has not made or endorsed it.\u003c\/p\u003e\n\u003ch2\u003eRelated reading and products\u003c\/h2\u003e\n\u003cp\u003eTo see how a pod hotel fits into a reef, read \u003ca href=\"\/blogs\/guides\/do-copepod-hotels-work\"\u003edo copepod hotels work\u003c\/a\u003e. For the media side, \u003ca href=\"\/blogs\/guides\/maxspect-bio-spheres-holder-sump\"\u003eMaxspect bio spheres and holders in a sump\u003c\/a\u003e is also worth a read.\u003c\/p\u003e\n\u003cp\u003ePods to start with are in \u003ca href=\"\/products\/live-marine-copepods\"\u003elive marine copepods\u003c\/a\u003e. The other holders are the \u003ca href=\"\/products\/maxspect-bio-block-holder-pod-hotel\"\u003ebio block holder\u003c\/a\u003e and the \u003ca href=\"\/products\/maxspect-bio-sphere-holder-pod-hotel\"\u003ebio sphere holder\u003c\/a\u003e, both in the \u003ca href=\"\/collections\/pod-hotels\"\u003epod hotels collection\u003c\/a\u003e.\u003c\/p\u003e","brand":"Marine Spec","offers":[{"title":"Midnight Black","offer_id":59905994654041,"sku":null,"price":21.99,"currency_code":"GBP","in_stock":true},{"title":"Scarlet Red","offer_id":59905994686809,"sku":null,"price":21.99,"currency_code":"GBP","in_stock":true},{"title":"Aqua Green","offer_id":59905994719577,"sku":null,"price":21.99,"currency_code":"GBP","in_stock":true},{"title":"Clown Orange","offer_id":59905994752345,"sku":null,"price":21.99,"currency_code":"GBP","in_stock":true},{"title":"Regal Blue","offer_id":59905994785113,"sku":null,"price":21.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/files\/ac00ac_62c059e40cba488aa2e9fc405550451f_1f427f85-c1fa-4a6d-8e8e-4ed259ab1964.png?v=1792090239"},{"product_id":"standing-frag-rack","title":"Standing frag rack V2 for the tank floor, Mini or Standard","description":"\u003ch2\u003eWhere does a standing frag rack go in the tank?\u003c\/h2\u003e\n\u003cp\u003eAt the bottom of the aquarium, where it helps new corals acclimate to their surroundings. It stands on its own, so there is nothing to fix to the glass and no thickness to check.\u003c\/p\u003e\n\u003cp\u003eFlow and light still matter when you choose the spot. Our guide to \u003ca href=\"\/blogs\/guides\/frag-rack-placement-flow-and-light\"\u003efrag rack placement, flow and light\u003c\/a\u003e covers it.\u003c\/p\u003e\n\u003ch2\u003eHow big are the Mini and Standard sizes?\u003c\/h2\u003e\n\u003cp\u003eBoth are 51mm high. They differ in length and width, so pick by the floor space you can spare.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003cth\u003eHeight\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMini\u003c\/td\u003e\n\u003ctd\u003e103mm\u003c\/td\u003e\n\u003ctd\u003e58mm\u003c\/td\u003e\n\u003ctd\u003e51mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e175mm\u003c\/td\u003e\n\u003ctd\u003e72mm\u003c\/td\u003e\n\u003ctd\u003e51mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eHow many frags it takes depends on your plug size and the rack footprint, so compare the dimensions with your plugs. Ours are \u003ca href=\"\/products\/black-coral-frag-plugs\"\u003eblack frag plugs\u003c\/a\u003e, and the \u003ca href=\"\/products\/fragdoc-frag-plug-dock\"\u003eFragDoc\u003c\/a\u003e mounts a plug on rockwork.\u003c\/p\u003e\n\u003ch2\u003eStanding rack or magnetic rack?\u003c\/h2\u003e\n\u003cp\u003eChoose standing if your corals will spend their first days on the tank floor. Choose the \u003ca href=\"\/products\/magnetic-frag-rack\"\u003emagnetic frag rack\u003c\/a\u003e if you want frags on the glass, where you can see them, and your glass suits the magnet you pick.\u003c\/p\u003e\n\u003cp\u003eWe lay out the differences, including egg crate, in \u003ca href=\"\/blogs\/guides\/magnetic-frag-rack-vs-standing-rack-vs-egg-crate\"\u003emagnetic vs standing vs egg crate racks\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eWhat colours can I get?\u003c\/h2\u003e\n\u003cp\u003eMidnight Black, Scarlet Red, Aqua Green, Clown Orange and Regal Blue. The Standard size has a photo for every colour. The gallery also shows a black and orange Special Edition colourway.\u003c\/p\u003e\n\u003cp\u003eSee the rest of the range under \u003ca href=\"\/collections\/frag-racks\"\u003efrag racks\u003c\/a\u003e. If you are new to them, read \u003ca href=\"\/blogs\/guides\/what-is-a-frag-rack\"\u003ewhat is a frag rack\u003c\/a\u003e first.\u003c\/p\u003e\n\u003cp\u003eBoth sizes are designed and 3D printed by Marine Spec.\u003c\/p\u003e","brand":"Marine Spec","offers":[{"title":"Standard \/ Midnight Black","offer_id":59905995440473,"sku":null,"price":23.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Scarlet Red","offer_id":59905995473241,"sku":null,"price":23.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Aqua Green","offer_id":59905995506009,"sku":null,"price":23.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Clown Orange","offer_id":59905995538777,"sku":null,"price":23.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Regal Blue","offer_id":59905995571545,"sku":null,"price":23.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Midnight Black","offer_id":59905995604313,"sku":null,"price":16.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Scarlet Red","offer_id":59905995637081,"sku":null,"price":16.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Aqua Green","offer_id":59905995669849,"sku":null,"price":16.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Clown Orange","offer_id":59905995702617,"sku":null,"price":16.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Regal Blue","offer_id":59905995735385,"sku":null,"price":16.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/files\/ac00ac_dadf3d9fa7b347d9b24662ef2a51f329.png?v=1792090236"},{"product_id":"magnetic-frag-rack","title":"Magnetic frag rack, 3 sizes, 5 colours, 2 magnet strengths","description":"\u003ch2\u003eWhich size of magnetic frag rack do I need?\u003c\/h2\u003e\n\u003cp\u003ePick by the space on your glass and the glass you have. Mini is the compact rack, Slim is long and narrow, and Standard has the biggest footprint. All 3 stand 38mm high.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003cth\u003eHeight\u003c\/th\u003e\n\u003cth\u003eStandard magnet, glass to\u003c\/th\u003e\n\u003cth\u003eStrong magnet, glass to\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMini\u003c\/td\u003e\n\u003ctd\u003e103mm\u003c\/td\u003e\n\u003ctd\u003e67.25mm\u003c\/td\u003e\n\u003ctd\u003e38mm\u003c\/td\u003e\n\u003ctd\u003e14mm\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlim\u003c\/td\u003e\n\u003ctd\u003e151mm\u003c\/td\u003e\n\u003ctd\u003e39.25mm\u003c\/td\u003e\n\u003ctd\u003e38mm\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e175mm\u003c\/td\u003e\n\u003ctd\u003e81.25mm\u003c\/td\u003e\n\u003ctd\u003e38mm\u003c\/td\u003e\n\u003ctd\u003e13mm\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eHow many frags fit depends on the size of your plugs and the rack footprint, so compare the lengths and widths above with your own plugs.\u003c\/p\u003e\n\u003ch2\u003eHow thick can my glass be?\u003c\/h2\u003e\n\u003cp\u003eIt depends on the size and the magnet. Measure your glass, then read the row for the rack you want. Standard size with a Standard magnet has the lowest rating at 13mm, and Slim with a Strong magnet has the highest at 20mm.\u003c\/p\u003e\n\u003cp\u003eNot sure which strength to pick? Our guide shows \u003ca href=\"\/blogs\/guides\/which-magnet-strength-for-your-glass\"\u003ewhich magnet strength suits your glass\u003c\/a\u003e. The ratings are stated for glass. If your tank is acrylic, \u003ca href=\"\/pages\/contact\"\u003emessage us\u003c\/a\u003e before you order.\u003c\/p\u003e\n\u003ch2\u003eAre the magnets safe in saltwater?\u003c\/h2\u003e\n\u003cp\u003eSaltwater is hard on magnets, so we spent 2 years refining ours. Each one is sealed inside a bonded plastic capsule, and the capsule is secured within the printed rack.\u003c\/p\u003e\n\u003cp\u003eThe outer magnet is different. It is for dry use only and is not waterproof. The longer answer is in our guide on \u003ca href=\"\/blogs\/guides\/are-magnets-safe-in-a-reef-tank\"\u003ewhether magnets are safe in a reef tank\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eCan I move the rack as the corals grow?\u003c\/h2\u003e\n\u003cp\u003eYes. A magnet holds it, so you can slide it along the glass to change how much light and flow your frags get, then move it again later. If you want a rack on the tank floor instead, look at the \u003ca href=\"\/products\/standing-frag-rack\"\u003estanding frag rack V2\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eNever used one? Start with \u003ca href=\"\/blogs\/guides\/what-is-a-frag-rack\"\u003ewhat a frag rack is\u003c\/a\u003e, or see how the options compare in \u003ca href=\"\/blogs\/guides\/magnetic-frag-rack-vs-standing-rack-vs-egg-crate\"\u003emagnetic, standing and egg crate racks\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eWhat colours does it come in?\u003c\/h2\u003e\n\u003cp\u003eThere are 5: Midnight Black, Scarlet Red, Aqua Green, Clown Orange and Regal Blue. Colour and magnet strength are separate options, so any colour takes either magnet. The photos change with the colour you choose.\u003c\/p\u003e\n\u003cp\u003eFrags need something to sit on, and our \u003ca href=\"\/products\/black-coral-frag-plugs\"\u003eblack frag plugs\u003c\/a\u003e and the \u003ca href=\"\/products\/fragdoc-frag-plug-dock\"\u003eFragDoc plug holder\u003c\/a\u003e sit in the same range. Browse everything under \u003ca href=\"\/collections\/frag-racks\"\u003efrag racks\u003c\/a\u003e or \u003ca href=\"\/collections\/magnetic-reef-accessories\"\u003emagnetic reef accessories\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eMade by us\u003c\/h2\u003e\n\u003cp\u003eEvery rack is designed and 3D printed by Marine Spec. If you need a size or shape we do not list, ask about \u003ca href=\"\/pages\/custom-3d-printing\"\u003ecustom 3D printing\u003c\/a\u003e.\u003c\/p\u003e","brand":"Marine Spec","offers":[{"title":"Mini \/ Midnight Black \/ Standard","offer_id":59906005238105,"sku":null,"price":30.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Midnight Black \/ Strong","offer_id":59906005270873,"sku":null,"price":37.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Scarlet Red \/ Standard","offer_id":59906005303641,"sku":null,"price":30.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Scarlet Red \/ Strong","offer_id":59906005336409,"sku":null,"price":37.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Aqua Green \/ Standard","offer_id":59906005369177,"sku":null,"price":30.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Aqua Green \/ Strong","offer_id":59906005401945,"sku":null,"price":37.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Clown Orange \/ Standard","offer_id":59906005434713,"sku":null,"price":30.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Clown Orange \/ Strong","offer_id":59906005467481,"sku":null,"price":37.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Regal Blue \/ Standard","offer_id":59906005500249,"sku":null,"price":30.99,"currency_code":"GBP","in_stock":true},{"title":"Mini \/ Regal Blue \/ Strong","offer_id":59906005533017,"sku":null,"price":37.99,"currency_code":"GBP","in_stock":true},{"title":"Slim \/ Midnight Black \/ Standard","offer_id":59906005565785,"sku":null,"price":32.99,"currency_code":"GBP","in_stock":true},{"title":"Slim \/ Midnight Black \/ Strong","offer_id":59906005598553,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true},{"title":"Slim \/ Scarlet Red \/ Standard","offer_id":59906005631321,"sku":null,"price":32.99,"currency_code":"GBP","in_stock":true},{"title":"Slim \/ Scarlet Red \/ Strong","offer_id":59906005664089,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true},{"title":"Slim \/ Aqua Green \/ Standard","offer_id":59906005696857,"sku":null,"price":32.99,"currency_code":"GBP","in_stock":true},{"title":"Slim \/ Aqua Green \/ Strong","offer_id":59906005729625,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true},{"title":"Slim \/ Clown Orange \/ Standard","offer_id":59906005762393,"sku":null,"price":32.99,"currency_code":"GBP","in_stock":true},{"title":"Slim \/ Clown Orange \/ Strong","offer_id":59906005795161,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true},{"title":"Slim \/ Regal Blue \/ Standard","offer_id":59906005827929,"sku":null,"price":32.99,"currency_code":"GBP","in_stock":true},{"title":"Slim \/ Regal Blue \/ Strong","offer_id":59906005860697,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Midnight Black \/ Standard","offer_id":59906005893465,"sku":null,"price":35.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Midnight Black \/ Strong","offer_id":59906005926233,"sku":null,"price":42.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Scarlet Red \/ Standard","offer_id":59906005959001,"sku":null,"price":35.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Scarlet Red \/ Strong","offer_id":59906005991769,"sku":null,"price":42.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Aqua Green \/ Standard","offer_id":59906006024537,"sku":null,"price":35.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Aqua Green \/ Strong","offer_id":59906006057305,"sku":null,"price":42.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Clown Orange \/ Standard","offer_id":59906006090073,"sku":null,"price":35.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Clown Orange \/ Strong","offer_id":59906006122841,"sku":null,"price":42.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Regal Blue \/ Standard","offer_id":59906006155609,"sku":null,"price":35.99,"currency_code":"GBP","in_stock":true},{"title":"Standard \/ Regal Blue \/ Strong","offer_id":59906006188377,"sku":null,"price":42.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/files\/ac00ac_0139f761905e46948103a248e9164f1e.png?v=1792090283"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1091\/7462\/0505\/collections\/ac00ac_42f46292e3cd4e09a8a4672a3cd48de6_mv2.jpg?v=1792018310","url":"https:\/\/marine-spec.co.uk\/collections\/3d-printed-reef-accessories.oembed","provider":"Marine Spec","version":"1.0","type":"link"}