For Sale UK

20l fish tank

4

20l fish tank for sale on largest auction and classifieds sites

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Fluval 20l betta - betta, fish

Fluval 20l betta - betta, fish

£99.99
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Aquarium heater submersible - aquarium,

Aquarium heater submersible - aquarium,

£12.99
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Hidom submersible tropical - submersible,

Hidom submersible tropical - submersible,

£10.95
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Fluval 20l betta aquarium - betta, kit

Fluval 20l betta aquarium - betta, kit

£99.99
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Fluval betta 20l aquarium - betta, kit

Fluval betta 20l aquarium - betta, kit

£84.95
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43l fish tank - 43l, glass

43l fish tank - 43l, glass

£34.99
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Lid feed cover - feed, for

Lid feed cover - feed, for

£10.99
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Nicrew slim aquarium filter - slim,

Nicrew slim aquarium filter - slim,

£17.47
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Stainless steel aquarium - stainless,

Stainless steel aquarium - stainless,

£11.89
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Superfish white led panorama - superfish,

Superfish white led panorama - superfish,

£54.99
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Glass rectangular freshwater - glass,

Glass rectangular freshwater - glass,

£54.25
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20l aquarium chiller quiet - 20l,

20l aquarium chiller quiet - 20l,

£102.10
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Black aqua one - aqua, due

Black aqua one - aqua, due

£99.99
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20l hexagonal hexagon hard - 20l,

20l hexagonal hexagon hard - 20l,

£21.50
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50w 500w led digital - digital, aquarium

50w 500w led digital - digital, aquarium

£18.67
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Superfish start tropical - superfish,

Superfish start tropical - superfish,

£92.99
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Quiet fish tank filter 1 - tank,

Quiet fish tank filter 1 - tank,

£25.99
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Fluval betta aquarium kit - fluval,

Fluval betta aquarium kit - fluval,

£99.99
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Fluval betta 20l - betta, replacement

Fluval betta 20l - betta, replacement

£41.99
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Aaquarium chiller aquarium - chiller,

Aaquarium chiller aquarium - chiller,

£92.59
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Aquael shrimp tank set - aquael,

Aquael shrimp tank set - aquael,

£103.99
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Nicrew slim aquarium filter - slim,

Nicrew slim aquarium filter - slim,

£18.96
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Pawhut 43l fish tank - 43l,

Pawhut 43l fish tank - 43l,

£45.99
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Fluval premium betta - betta, aquarium

Fluval premium betta - betta, aquarium

£119.99
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Nicrew slim aquarium filter - slim,

Nicrew slim aquarium filter - slim,

£23.21
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Boxtech mini aquarium sponge - mini,

Boxtech mini aquarium sponge - mini,

£14.33
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Fluval betta 20l natural - 20l,

Fluval betta 20l natural - 20l,

£124.99
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Fluval aquarium heater - t,

Fluval aquarium heater - t,

£22.49
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Fish tank aqurium small 1 - tank,

Fish tank aqurium small 1 - tank,

£6.21
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Seachem sicce tidal - sicce,

Seachem sicce tidal - sicce,

£60.99
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Marina air pump - air, quiet

Marina air pump - air, quiet

£17.00
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Ati aluminium based - ati,

Ati aluminium based - ati,

£28.57
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Silver aquarium fish tank - tank, sand

Silver aquarium fish tank - tank, sand

£27.54
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Fish fun heater thermostat - fish,

Fish fun heater thermostat - fish,

£11.45
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Glass freshwater 50l - glass,

Glass freshwater 50l - glass,

£10.80
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Aquarium 50w 500w digital - aquarium, to

Aquarium 50w 500w digital - aquarium, to

£15.54
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For xiaomi 20l smart fish - xiaomi,

For xiaomi 20l smart fish - xiaomi,

£29.86
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Aquael plastic ultra - plastic, heater

Aquael plastic ultra - plastic, heater

£29.95
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72w aquarium fish - aquarium,

72w aquarium fish - aquarium,

£116.49
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Pawhut 51l fish tank with - 51l,

Pawhut 51l fish tank with - 51l,

£95.00
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Alfagrog e25 ceramic filter - alfagrog,

Alfagrog e25 ceramic filter - alfagrog,

£32.95
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Fluval series aquarium - t,

Fluval series aquarium - t,

£24.99
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Osatnb quiet fish tank filter - osatnb,

Osatnb quiet fish tank filter - osatnb,

£30.13
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Nicrew slim aquarium - slim, filter

Nicrew slim aquarium - slim, filter

£17.71
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Aquarium 50w 500w digital - aquarium,

Aquarium 50w 500w digital - aquarium,

£16.62
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Marina cool air pump for - marina,

Marina cool air pump for - marina,

£8.49
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Aquarium fish tank heater - aquarium,

Aquarium fish tank heater - aquarium,

£15.44
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Nicrew slim aquarium filter - nicrew,

Nicrew slim aquarium filter - nicrew,

£18.25
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Oase bioplus internal corner - oase,

Oase bioplus internal corner - oase,

£32.50
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Internal aquarium fish tank

Internal aquarium fish tank

£10.45
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Pawhut turtle tank 50l glass - pawhut,

Pawhut turtle tank 50l glass - pawhut,

£59.99
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Aquarium nordic 6mm - aquarium,

Aquarium nordic 6mm - aquarium,

£27.75
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Tropical aquarium fish tank - tropical,

Tropical aquarium fish tank - tropical,

£17.30
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Aqua one dynamic 55l aquarium - one,

Aqua one dynamic 55l aquarium - one,

£159.99
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Nicrew slim aquarium - aquarium, filter

Nicrew slim aquarium - aquarium, filter

£17.32
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Superfish aqua flow - superfish, filter

Superfish aqua flow - superfish, filter

£14.99
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Mini 10w usb aquarium - 10w, heater

Mini 10w usb aquarium - 10w, heater

£19.19
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Aquarium air pump marina cool - aquarium,

Aquarium air pump marina cool - aquarium,

£7.99
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Superfish pro aquarium fish - superfish,

Superfish pro aquarium fish - superfish,

£18.99
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Seachem tidal 75 110 - 35,

Seachem tidal 75 110 - 35,

£49.45
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Superfish aquaflow aquarium - aquaflow,

Superfish aquaflow aquarium - aquaflow,

£14.99
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Oase bioplus thermo compact - bioplus,

Oase bioplus thermo compact - bioplus,

£39.99
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Easy maintain fish tank - easy-to-maintain,

Easy maintain fish tank - easy-to-maintain,

£31.90
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Interpet neo aquarium air - aquarium,

Interpet neo aquarium air - aquarium,

£23.99
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Fish tank for sale - tank, +

Fish tank for sale - tank, +

£63.10
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Superfish eco heater - superfish,

Superfish eco heater - superfish,

£15.75
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Aquarium nordic 8mm - -,

Aquarium nordic 8mm - -,

£15.99
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Fish tank filter internal - fish,

Fish tank filter internal - fish,

£19.36
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200 300 500w led digital - led,

200 300 500w led digital - led,

£16.01
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Fluval aquarium heater fully - aquarium,

Fluval aquarium heater fully - aquarium,

£28.25
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Superfish aqua flow - superfish,

Superfish aqua flow - superfish,

£12.50
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Marina air pump quiet flow - air,

Marina air pump quiet flow - air,

£10.99
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Superfish aquaflow internal - superfish,

Superfish aquaflow internal - superfish,

£14.99
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Small aquarium filter hang - small,

Small aquarium filter hang - small,

£10.95
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100w aquarium heater - 100w,

100w aquarium heater - 100w,

£14.99
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Fluval m50 submersible - fluval,

Fluval m50 submersible - fluval,

£20.29
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Tetratec air pump spare - spare, kit

Tetratec air pump spare - spare, kit

£8.45
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20l aquarium chiller quiet - aquarium,

20l aquarium chiller quiet - aquarium,

£97.12
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Ciano internal aquarium power - ciano,

Ciano internal aquarium power - ciano,

£19.79
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Nicrew slim aquarium - nicrew,

Nicrew slim aquarium - nicrew,

£17.77
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Small aquarium internal filter - small,

Small aquarium internal filter - small,

£9.95
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50w aquarium heater - aquarium,

50w aquarium heater - aquarium,

£11.45
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Evolution aqua micro filter - evolution,

Evolution aqua micro filter - evolution,

£118.95
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Tetratec air pump aquarium - air,

Tetratec air pump aquarium - air,

£18.04
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Interpet pf2 aquarium - pf2,

Interpet pf2 aquarium - pf2,

£21.49
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Interpet goldfish bowl - interpet,

Interpet goldfish bowl - interpet,

£2.99
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Slim aquarium filter quiet - slim,

Slim aquarium filter quiet - slim,

£21.99
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Versatile mini fish tank - versatile,

Versatile mini fish tank - versatile,

£23.99
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Fish tank filter - tank, for

Fish tank filter - tank, for

£18.83
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Aquarium led light - on, 6w

Aquarium led light - on, 6w

£13.99
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Submersible aquarium heater - aquarium,

Submersible aquarium heater - aquarium,

£15.54
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Submersible aquarium heater - submersible,

Submersible aquarium heater - submersible,

£14.81
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Fluval aquarium heater - fluval,

Fluval aquarium heater - fluval,

£19.99
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Hidom aquarium heater - hidom,

Hidom aquarium heater - hidom,

£10.95
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20l rectangular standard glass - standard,

20l rectangular standard glass - standard,

£125.00
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Interpet aquarium filter - interpet,

Interpet aquarium filter - interpet,

£21.49
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📊96 listings · from £2.99 · avg £37.29
⚠️ These listings were last updated more than 11 days ago. Search for fresh listings

Browse 96 20l fish tank listings currently in our index. Prices range from £2.99 to £159.99, with an average of £37.29. 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 20l fish tank →

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Everything you need to know about 20l fish tank

Whether you are looking for a brand-new or second-hand 20l fish 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 £2.99, while premium listings can reach £159.99 — giving you a wide budget spread to work with. The average price of £37.29 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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