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Every Marine Spec product is here in 1 place: 3D printed frag racks, feeders and pod hotels, live phytoplankton, copepods and brine shrimp, ABC reagents, water for collection, and reef stickers and apparel.

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Use the filters to narrow by type, colour, magnet strength or price, or start with the family that matches the job on your tank. Prices are in pounds, and shipping costs are shown at checkout.

22 products

Products

Mini magnetic frag rack in Midnight Black with its magnet block underneath Mini magnetic frag racks in all 5 colours laid out together
New
Choose options

3D printed

Magnetic frag rack, 3 sizes, 5 colours, 2 magnet strengths

Acclimating and growing on coral frags on the glass

From £30.99
Man seated wearing the white Stay Mindful, Keep Reefing t-shirt, front view Woman standing in the white Stay Mindful, Keep Reefing t-shirt, front view
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Merchandise

Stay Mindful, Keep Reefing organic cotton t-shirt, White or Navy

Reefers who want The Spiritual Reefer emblem on something to wear

From £23.00
Man wearing the French Navy Reef State, Meditate t-shirt, front view Woman wearing the French Navy Reef State, Meditate t-shirt, front view
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Merchandise

Reef State, Meditate organic cotton t-shirt, Navy or White

Reefers who want The Spiritual Reefer emblem on something to wear

From £23.00
Man wearing the French Navy Stay Mindful, Keep Reefing sweatshirt, seen from the back Man standing in the French Navy Stay Mindful, Keep Reefing sweatshirt, front view
Choose options

Merchandise

Stay Mindful, Keep Reefing organic sweatshirt, Navy or White

Reefers who want The Spiritual Reefer emblem on something to wear

From £35.50
Woman wearing the French Navy Reef State, Meditate sweatshirt, seen from the back Woman seated wearing the French Navy Reef State, Meditate sweatshirt, front view
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Merchandise

Reef State, Meditate organic sweatshirt, French Navy or White

Reefers who want The Spiritual Reefer emblem on something to wear

From £35.50
The Spiritual Reefer coral yin yang emblem sticker in navy and white on black The Spiritual Reefer name sticker in navy and white on a black background
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Merchandise

The Spiritual Reefer stickers, coral yin yang emblem, 4 finishes

Fans of The Spiritual Reefer channel

From £2.50
Marine Spec clownfish logo sticker in orange on a black background Marine Spec logo and text sticker in orange and white on black
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Merchandise

Marine Spec logo reef stickers, 3 designs, 4 finishes

Cabinets, equipment and notebooks

From £2.50
Standing frag rack V2 in Midnight Black, Standard size, on white Standing frag rack V2 in 5 colours lined up side by side
Choose options

3D printed

Standing frag rack V2 for the tank floor, Mini or Standard

Settling new corals on the tank floor

From £16.99
Maxspect anaerobic block holder and pod hotel V2 in Midnight Black with 2 blocks on top Maxspect anaerobic block holder and pod hotel V2 in red with 2 blocks on top
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3D printed

Maxspect anaerobic block holder and pod hotel V2, holds 2

Holding 2 Maxspect Nano Tech anaerobic blocks

£21.99
Maxspect bio block holder and pod hotel V2 in Midnight Black 3 Maxspect bio block holders and pod hotels V2 in green, blue and red
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3D printed

Maxspect bio block holder and pod hotel V2, holds 2 blocks

Running 2 Maxspect Nano Tech bio blocks in a low profile holder

£19.99
Maxspect bio sphere holders and pod hotels V2 in several colours, grouped together Top view of 3 Maxspect bio sphere holders showing the Marine Spec logo and coloured slots
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3D printed

Maxspect bio sphere holder and copepod hotel V2, holds 1kg

Reefers running Maxspect Nano Tech bio spheres who want a pod hotel

£23.99
ABC reagents 2, 4 and 6 month kits arranged together, promotional photo showing all bottles ABC reagents 2 month kit, 4 bottles of pre mixed reagents A, B and C
Sold out

Dry goods

ABC reagents UK, pre mixed 2, 4 or 6 month kits

Automated alkalinity, calcium and magnesium testing

From £32.99
Marine Spec live nannochloropsis phytoplankton in 250ml and 500ml pouches side by side Marine Spec live nannochloropsis phytoplankton pouch full of dark green culture
Choose options

Live food

Live nannochloropsis phytoplankton UK, 250ml or 500ml

Feeding corals and copepods, or starting a home culture

From £5.99
Magnetic butterfly feeder front face with 5 round openings sized for butterflyfish mouths Magnetic butterfly feeder parts: removable cap, body and Dry Side magnet housing with fish logo
New
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3D printed

Magnetic butterfly feeder for copperband butterflyfish

Target feeding copperband butterflyfish and other fussy eaters

From £27.99
Magnetic nori feeder front, a grid of openings over the nori tray Magnetic nori feeder from the side with its magnet housing and clownfish logo
New
Choose options

3D printed

Magnetic nori feeder for tangs, Standard or Strong magnet

Tangs and other herbivores that graze on nori

From £28.99
Black Marine Spec frag plugs, round and square tops with detachable stems, laid out together Black round and square frag plugs with stems side by side on white
Choose options

3D printed

Black frag plugs, 25mm round or 27mm square, packs of 5 to 20

SPS frags and a low profile look in the rockwork

From £3.49
FragDoc frag plug docks in black, with the Marine Spec clownfish logo on one Round and square black frag plugs seated in FragDoc docks
Choose options

3D printed

FragDoc frag plug holder for rockwork, packs of 3, 5 or 10

Mounting frags on rockwork so they can be swapped

From £4.99
Neptune AFS auto feeder seated in the Marine Spec 3D printed mount Marine Spec Neptune AFS mount seen from above, an empty black tray

3D printed

Neptune AFS mount for Red Sea ReefLED pendant, 3D printed

Fitting a Neptune AFS inside a Red Sea ReefLED pendant

£19.99
Marine Spec live marine copepods 250ml pouch, front label Close up of live copepods suspended in the Marine Spec pouch
Sold out

Live food

Live marine copepods UK, 250ml pouch for reef tanks

Feeding fish and corals and seeding pod dependent species

£13.00
Marine Spec live baby brine shrimp 250ml pouch, front label Back of the Marine Spec live baby brine shrimp 250ml pouch with label
Sold out

Live food

Live baby brine shrimp 250ml for mandarins and young copperbands

Picky eaters such as mandarin goby and young copperbands

£9.99
Close up of clear blue water with bubbles, used for the natural sea water listing
Collection only

Water

Natural sea water 25 litres, collection only in Suffolk

Marine aquariums that want natural seawater, collected in Suffolk

£6.99
Clear blue water with bubbles, used as the image for our RODI water
Collection only

Water

RODI water 0 TDS, collection only from Suffolk

Top ups and mixing salt, collected in Suffolk

£2.90
Blue lit tiered frag racks on display, a custom build by Marine Spec Need something made for your tank Start an enquiry

Questions about Shop all

Where should I start if I have not ordered from Marine Spec before?

Pick the family that matches your problem. Frag racks suit new corals, feeders suit fussy eaters, and Maxspect pod hotels suit sumps that need pod habitat. If you are unsure, message Harry on WhatsApp.

Why do some products show a From price?

Those products come in several sizes, strengths or finishes at different prices. The From price is the lowest option, and the page shows the exact price as you choose each option.

Which products cannot be posted?

RODI water and natural sea water are collection only, and coral is collection only when it is in stock. Everything else is posted. Shipping costs are shown at checkout.

Why does apparel take longer to arrive than a feeder?

Tees and sweatshirts are made to order by a third party provider after you buy, and they usually dispatch within 5 working days. Our own products are usually dispatched the next working day.

Can I collect my order instead of having it posted?

Local collection is available for non merchandise items. Choose the pickup option at checkout, or message Harry on WhatsApp to arrange a time.

Guides

Read all guides
ABC reagents 2, 4 and 6 month kits arranged together, promotional photo showing all bottles

15 October 2026

How to use ABC reagents, and why you recalibrate

Pre mixed ABC reagents pour straight into your existing reagent bottles. Calibrate your automated testing system after installing...

Read the guide
Magnetic nori feeder front, a grid of openings over the nori tray

15 October 2026

Nori clip, feeding ring or magnetic nori feeder: which should you use?

A nori clip holds 1 edge of the sheet, a feeding ring contains floating food, and a magnetic...

Read the guide
Maxspect bio sphere holders and pod hotels V2 in several colours, grouped together

15 October 2026

How to hold Maxspect bio spheres in a sump or tank

A bio sphere holder keeps 1kg of Maxspect Nano Tech bio spheres in place with water flowing through...

Read the guide
Marine Spec live nannochloropsis phytoplankton in 250ml and 500ml pouches side by side

15 October 2026

Is live phytoplankton good for corals? What it does and what to expect

Live phytoplankton feeds a reef tank, but how much corals take directly is debated. Copepods and filter feeders...

Read the guide