For Sale UK

Saltwater tank

4

Saltwater tank for sale on largest auction and classifieds sites

Home / Tool Accessories / Saltwater tank for sale – 96 used, around £21 | For Sale UK
Internal aquarium fish tank - aquarium,

Internal aquarium fish tank - aquarium,

£16.99
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25l tank nano glass - 25l,

25l tank nano glass - 25l,

£48.54
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Fluval aquaplus water - aquaplus,

Fluval aquaplus water - aquaplus,

£12.65
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25l tank nano glass - 25l, tank,

25l tank nano glass - 25l, tank,

£49.58
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Mini float valve white - mini, auto

Mini float valve white - mini, auto

£5.03
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Salifert test kit marine - salifert,

Salifert test kit marine - salifert,

£12.89
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Salifert flatworm exit reef - salifert,

Salifert flatworm exit reef - salifert,

£19.95
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Deltec nfp90 nitrate reactor - nfp90,

Deltec nfp90 nitrate reactor - nfp90,

£208.70
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55l cube glass fish tank - 55l, with

55l cube glass fish tank - 55l, with

£414.70
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Salifert profi test kit - test,

Salifert profi test kit - test,

£12.95
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Fluval m50 submersible fish - m50,

Fluval m50 submersible fish - m50,

£20.49
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Api 5in1 aquarium water - 5in1, test

Api 5in1 aquarium water - 5in1, test

£7.99
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Fluval sea evo nano saltwater - fluval,

Fluval sea evo nano saltwater - fluval,

£159.99
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Aqua one minireef black - minireef,

Aqua one minireef black - minireef,

£349.99
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Led glass aquarium fish - fish, tank

Led glass aquarium fish - fish, tank

£29.95
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Aqua one aquanano - one, aquarium

Aqua one aquanano - one, aquarium

£156.70
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Waterlife buffer 200g - waterlife,

Waterlife buffer 200g - waterlife,

£9.99
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Fluval sea salt hydrometer - fluval,

Fluval sea salt hydrometer - fluval,

£9.65
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Api master test kits - api,

Api master test kits - api,

£29.99
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Waterlife buffer 2 8 3 - buffer, 7.2,

Waterlife buffer 2 8 3 - buffer, 7.2,

£9.99
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Salifert profi test - profi, for

Salifert profi test - profi, for

£10.25
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Salifert marine all - in, one

Salifert marine all - in, one

£14.20
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Fluval m150 submersible fish - m150,

Fluval m150 submersible fish - m150,

£20.99
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Dipstik aquarium test - dipstik,

Dipstik aquarium test - dipstik,

£11.61
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Funktion freshwater - d-d,

Funktion freshwater - d-d,

£89.99
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Aquarium test strips way - aquarium, strips,

Aquarium test strips way - aquarium, strips,

£11.64
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Way aquarium test strips - test, 50

Way aquarium test strips - test, 50

£13.73
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Tmc salifert profi - tmc,

Tmc salifert profi - tmc,

£11.58
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Display aqua one - aqua,

Display aqua one - aqua,

£689.99
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Aquarium filter media - aquarium,

Aquarium filter media - aquarium,

£7.58
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Red sea reefer 450 marine - red,

Red sea reefer 450 marine - red,

£208.70
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Aqua one minireef white - one, 90

Aqua one minireef white - one, 90

£349.99
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Pl7 set dry live tonga - of,

Pl7 set dry live tonga - of,

£26.70
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Achilles tang live - achilles,

Achilles tang live - achilles,

£247.15
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Aquaforest carbon marine - carbon,

Aquaforest carbon marine - carbon,

£15.99
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1000w aquarium heater - 1000w,

1000w aquarium heater - 1000w,

£49.99
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Activated carbon pellet form - activated,

Activated carbon pellet form - activated,

£49.95
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Activated carbon pellet form - activated,

Activated carbon pellet form - activated,

£49.95
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Aquarium leveling mat non - mat,

Aquarium leveling mat non - mat,

£6.99
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Aquatown fish tank - , still

Aquatown fish tank - , still

£42.30
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Piece aquarium artificial - 5-piece,

Piece aquarium artificial - 5-piece,

£5.89
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Saltwater salt gravimeter - saltwater,

Saltwater salt gravimeter - saltwater,

£6.23
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Dragon breath macroalgae - breath,

Dragon breath macroalgae - breath,

£26.70
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Salifert oxygen profi test - salifert,

Salifert oxygen profi test - salifert,

£11.70
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Salifert silicate profi test - salifert,

Salifert silicate profi test - salifert,

£12.45
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Activated carbon pellet form - pellet,

Activated carbon pellet form - pellet,

£9.49
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Biorb amazonas root sculpture - amazonas,

Biorb amazonas root sculpture - amazonas,

£11.95
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Aquavital avho160 hang - aquavital, on

Aquavital avho160 hang - aquavital, on

£14.00
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Pl1 lovely dry - lovely,

Pl1 lovely dry - lovely,

£63.10
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Biorb cube 30l - cube,

Biorb cube 30l - cube,

£145.95
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1400l ultra silent - 1400l/h, external

1400l ultra silent - 1400l/h, external

£139.99
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Seachem reef calcium marine - seachem,

Seachem reef calcium marine - seachem,

£13.31
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Aquarium protein skimmer - aquarium,

Aquarium protein skimmer - aquarium,

£66.22
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Fluval sea evo - fluval,

Fluval sea evo - fluval,

£144.99
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Tunze comline doc - comline,

Tunze comline doc - comline,

£149.99
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Automatic water top - water, off

Automatic water top - water, off

£49.99
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Salifert test kit set - salifert, marine

Salifert test kit set - salifert, marine

£34.95
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Api master saltwater test - master,

Api master saltwater test - master,

£29.99
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Seachem reef plus complete - seachem,

Seachem reef plus complete - seachem,

£19.55
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Led glass aquarium fish tank - glass,

Led glass aquarium fish tank - glass,

£49.50
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Salifert test kit - test, set

Salifert test kit - test, set

£74.99
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Tunze comline streamfilter - tunze,

Tunze comline streamfilter - tunze,

£104.99
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Coral holder high quality - high,

Coral holder high quality - high,

£16.13
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Biorb treasure chest sculpture - treasure,

Biorb treasure chest sculpture - treasure,

£14.01
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Salifert test kit set - kit, marine

Salifert test kit set - kit, marine

£28.99
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Fluval aquaplus cycle 500ml - &,

Fluval aquaplus cycle 500ml - &,

£22.99
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Tunze care magnet aquarium - care,

Tunze care magnet aquarium - care,

£94.95
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Activated carbon pellet form - activated,

Activated carbon pellet form - activated,

£16.95
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Hikari marine 50g - 50g, sinking

Hikari marine 50g - 50g, sinking

£8.25
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Popbloom rl180 wifi reef led - popbloom,

Popbloom rl180 wifi reef led - popbloom,

£189.00
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Eheim aquastar marine - aquastar, 63

Eheim aquastar marine - aquastar, 63

£370.45
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Aquarium silence strip fish - silence,

Aquarium silence strip fish - silence,

£6.14
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Activated carbon pellet form - carbon,

Activated carbon pellet form - carbon,

£39.75
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Oase biorb sea fan - sea,

Oase biorb sea fan - sea,

£13.95
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Liquid water level sensor - liquid,

Liquid water level sensor - liquid,

£2.78
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Aqua one aquarium fish tanks - aquarium,

Aqua one aquarium fish tanks - aquarium,

£1139.99
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Aquarium test strips - aquarium, strips,

Aquarium test strips - aquarium, strips,

£11.48
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Seachem carbonate complete - seachem,

Seachem carbonate complete - seachem,

£9.52
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Salifert test kh - kh, kit

Salifert test kh - kh, kit

£39.99
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Vastocean coral cutter with - vastocean,

Vastocean coral cutter with - vastocean,

£14.52
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Oase biorb coloured sea - oase,

Oase biorb coloured sea - oase,

£13.95
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Reef zlements icp saltwater - reef,

Reef zlements icp saltwater - reef,

£59.99
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Aquarium test strips 1 - 8-in-1, 50

Aquarium test strips 1 - 8-in-1, 50

£15.88
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Biorb classic 60l white - biorb,

Biorb classic 60l white - biorb,

£187.95
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Aquarium ammonia test - aquarium,

Aquarium ammonia test - aquarium,

£14.09
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Labs marine lab test - labs, kit

Labs marine lab test - labs, kit

£13.99
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Detailed mangrove aquatic - detailed,

Detailed mangrove aquatic - detailed,

£23.99
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Aquarium test strips pack - strips, 50

Aquarium test strips pack - strips, 50

£13.50
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Oase biorb sea - whips, of

Oase biorb sea - whips, of

£9.95
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Activated carbon pellet form - carbon,

Activated carbon pellet form - carbon,

£8.95
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Biorb seahorses coral - biorb,

Biorb seahorses coral - biorb,

£46.49
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Durable piece 180 - durable, 5-piece

Durable piece 180 - durable, 5-piece

£12.99
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Api master test - kit, freshwater

Api master test - kit, freshwater

£28.95
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Biorb medium green - biorb, green/green

Biorb medium green - biorb, green/green

£24.95
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120cm 4ft reef tank - ex-reef,

120cm 4ft reef tank - ex-reef,

£208.70
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Fluval m50 submersible - m50,

Fluval m50 submersible - m50,

£16.15
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📊96 listings · from £2.78 · avg £77.52

Browse 96 saltwater tank listings currently in our index. Prices range from £2.78 to £1139.99, with an average of £77.52. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about saltwater tank →

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Everything you need to know about saltwater tank

Whether you are looking for a brand-new or second-hand saltwater tank, eBay offers one of the largest selections available online. With 96 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £2.78, while premium listings can reach £1139.99 — giving you a wide budget spread to work with. The average price of £77.52 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.

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