For Sale UK

20l fish tank

4

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

Home / Fish & Aquarium / 20l fish tank refurbished & used for sale | For Sale UK
20l aquarium fish tank - fish,

20l aquarium fish tank - fish,

£29.59 · Buy It Now

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20l aquarium fish tank with - tank,

20l aquarium fish tank with - tank,

£29.99 · Buy It Now

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20l aquarium fish tank with - fish,

20l aquarium fish tank with - fish,

£29.99 · Buy It Now

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Aquarium heater submersible - aquarium,

Aquarium heater submersible - aquarium,

£12.99 · Buy It Now

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20l aquarium fish tank with - aquarium,

20l aquarium fish tank with - aquarium,

£29.99 · Buy It Now

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20l aquarium fish tank - aquarium, with

20l aquarium fish tank - aquarium, with

£29.59 · Buy It Now

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Fluval 20l betta aquarium fish - fluval,

Fluval 20l betta aquarium fish - fluval,

£99.99 · Buy It Now

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Fluval 20l betta aquarium kit - fluval,

Fluval 20l betta aquarium kit - fluval,

£99.99 · Buy It Now

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Superfish white led panorama - superfish,

Superfish white led panorama - superfish,

£54.99 · Buy It Now

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20l aquarium fish tank with - aquarium,

20l aquarium fish tank with - aquarium,

£30.99 · Buy It Now

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20l aquarium fish tank - aquarium,

20l aquarium fish tank - aquarium,

£40.29 · Buy It Now

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Stainless steel aquarium - stainless,

Stainless steel aquarium - stainless,

£11.04 · Buy It Now

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20l aquarium fish - fish, tank

20l aquarium fish - fish, tank

£40.29 · Buy It Now

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Hidom submersible tropical - submersible,

Hidom submersible tropical - submersible,

£10.95 · Buy It Now

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Pawhut 50l glass turtle tank - turtle,

Pawhut 50l glass turtle tank - turtle,

£81.99 · Buy It Now

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20l led aquarium - 20l, includes

20l led aquarium - 20l, includes

£54.78 · Buy It Now

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Fluval betta 20l replacement - fluval,

Fluval betta 20l replacement - fluval,

£79.99 · Buy It Now

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20l aquarium fish tank with - 20l,

20l aquarium fish tank with - 20l,

£47.99 · Buy It Now

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20l aquarium fish tank - tank, with

20l aquarium fish tank - tank, with

£40.29 · Buy It Now

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Fluval betta aquarium - aquarium, 20l

Fluval betta aquarium - aquarium, 20l

£99.99 · Buy It Now

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20l aquarium fish tank with - fish,

20l aquarium fish tank with - fish,

£47.99 · Buy It Now

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Nicrew slim aquarium filter - nicrew,

Nicrew slim aquarium filter - nicrew,

£17.47 · Buy It Now

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Lid feed cover for fluval - for,

Lid feed cover for fluval - for,

£10.99 · Buy It Now

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20l aquarium fish tank with - aquarium,

20l aquarium fish tank with - aquarium,

£29.69 · Buy It Now

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Fish fun heater thermostat - fish, r

Fish fun heater thermostat - fish, r

£11.45 · Buy It Now

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50w 500w led digital - 50w-500w,

50w 500w led digital - 50w-500w,

£12.17 · Buy It Now

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Fish tank aqurium - 6, in

Fish tank aqurium - 6, in

£7.19 · Buy It Now

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50w 500w led - led, digital

50w 500w led - led, digital

£16.07 · Buy It Now

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Aquarium chiller - aquarium,

Aquarium chiller - aquarium,

£111.31 · Buy It Now

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200 300 500w led digital - 200/300/500w,

200 300 500w led digital - 200/300/500w,

£15.55 · Buy It Now

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Superfish aquaflow aquarium - aquaflow,

Superfish aquaflow aquarium - aquaflow,

£14.99 · Buy It Now

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Aquarium fish tank - aquarium,

Aquarium fish tank - aquarium,

£15.61 · Buy It Now

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Alfagrog e25 ceramic - e25, filter

Alfagrog e25 ceramic - e25, filter

£32.95 · Buy It Now

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Pawhut turtle tank 50l - pawhut,

Pawhut turtle tank 50l - pawhut,

£59.99 · Buy It Now

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Aquarium fish tank - fish, heater

Aquarium fish tank - fish, heater

£15.44 · Buy It Now

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Aquarium 50w 500w digital - 50w,

Aquarium 50w 500w digital - 50w,

£15.97 · Buy It Now

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50w 500w led digital aquarium - led,

50w 500w led digital aquarium - led,

£17.16 · Buy It Now

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Fluval premium betta aquarium - fluval,

Fluval premium betta aquarium - fluval,

£119.99 · Buy It Now

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Quiet fish tank - quiet,

Quiet fish tank - quiet,

£24.79 · Buy It Now

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Superfish aqua flow filter - superfish,

Superfish aqua flow filter - superfish,

£14.99 · Buy It Now

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Fluval aquarium heater - fluval, t

Fluval aquarium heater - fluval, t

£22.49 · Buy It Now

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Nicrew slim aquarium - nicrew, filter

Nicrew slim aquarium - nicrew, filter

£17.66 · Buy It Now

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Black aqua one - aqua, glass

Black aqua one - aqua, glass

£99.99 · Buy It Now

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Aquael plastic ultra - aquael,

Aquael plastic ultra - aquael,

£29.95 · Buy It Now

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Pond koi filter media - media, bio

Pond koi filter media - media, bio

£69.99 · Buy It Now

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200 300 500w led digital - led,

200 300 500w led digital - led,

£15.66 · Buy It Now

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Vislone 70w 20l small fish - 70w,

Vislone 70w 20l small fish - 70w,

£78.97 · Buy It Now

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Heavy duty wood - heavy, stand

Heavy duty wood - heavy, stand

£50.13 · Buy It Now

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Nicrew slim aquarium - nicrew,

Nicrew slim aquarium - nicrew,

£18.96 · Buy It Now

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Fluval series aquarium - t,

Fluval series aquarium - t,

£26.99 · Buy It Now

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New electric water - water, chiller

New electric water - water, chiller

£101.96 · Buy It Now

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Submersible aquarium heater - submersible,

Submersible aquarium heater - submersible,

£15.54 · Buy It Now

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Small aquarium internal filter - small,

Small aquarium internal filter - small,

£9.95 · Buy It Now

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Fluval betta 20l natural - fluval,

Fluval betta 20l natural - fluval,

£124.99 · Buy It Now

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Aquarium 50w 500w digital - aquarium, to

Aquarium 50w 500w digital - aquarium, to

£14.75 · Buy It Now

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Nicrew slim aquarium filter - nicrew,

Nicrew slim aquarium filter - nicrew,

£19.34 · Buy It Now

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200 300 500w - 200/300/500w, led

200 300 500w - 200/300/500w, led

£16.21 · Buy It Now

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Aquael shrimp tank - shrimp, set

Aquael shrimp tank - shrimp, set

£103.99 · Buy It Now

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Nicrew slim aquarium filter - slim,

Nicrew slim aquarium filter - slim,

£18.99 · Buy It Now

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Submersible aquarium heater - submersible,

Submersible aquarium heater - submersible,

£16.01 · Buy It Now

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Aquarium 50w 500w digital - aquarium,

Aquarium 50w 500w digital - aquarium,

£16.62 · Buy It Now

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Interpet bioactive tap safe - interpet,

Interpet bioactive tap safe - interpet,

£4.95 · Buy It Now

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Aquarium nordic 6mm - nordic, 4

Aquarium nordic 6mm - nordic, 4

£27.75 · Buy It Now

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50w 500w led digital - led, aquarium

50w 500w led digital - led, aquarium

£16.26 · Buy It Now

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Aquarium chiller - ›aquarium,

Aquarium chiller - ›aquarium,

£113.68 · Buy It Now

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Oase bioplus thermo - oase,

Oase bioplus thermo - oase,

£31.95 · Buy It Now

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Marina air pump quiet flow - marina,

Marina air pump quiet flow - marina,

£10.99 · Buy It Now

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Aaquarium chiller aquarium - aaquarium,

Aaquarium chiller aquarium - aaquarium,

£97.46 · Buy It Now

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100w aquarium heater - aquarium,

100w aquarium heater - aquarium,

£14.99 · Buy It Now

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Superfish aqua flow - aqua,

Superfish aqua flow - aqua,

£12.50 · Buy It Now

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Fish tank filter internal - fish, filter,

Fish tank filter internal - fish, filter,

£18.28 · Buy It Now

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Ciano internal aquarium power - aquarium,

Ciano internal aquarium power - aquarium,

£19.79 · Buy It Now

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Boxtech mini aquarium sponge - aquarium,

Boxtech mini aquarium sponge - aquarium,

£14.19 · Buy It Now

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Tetra tetratec air - air, pump

Tetra tetratec air - air, pump

£15.97 · Buy It Now

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Aquarium 50w 500w - 50w,

Aquarium 50w 500w - 50w,

£17.90 · Buy It Now

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Pro aquarium co2 system - pro, for

Pro aquarium co2 system - pro, for

£151.99 · Buy It Now

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Silver aquarium fish tank - fish,

Silver aquarium fish tank - fish,

£28.99 · Buy It Now

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Hidom aquarium heater - hidom,

Hidom aquarium heater - hidom,

£10.95 · Buy It Now

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Aquarium led light clip - led,

Aquarium led light clip - led,

£11.89 · Buy It Now

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Nicrew internal aquarium - internal,

Nicrew internal aquarium - internal,

£21.24 · Buy It Now

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Fish tank filter internal - tank, filter,

Fish tank filter internal - tank, filter,

£19.36 · Buy It Now

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20l 35l electric water - electric, chiller

20l 35l electric water - electric, chiller

£101.82 · Buy It Now

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Hagen marina submersible - marina,

Hagen marina submersible - marina,

£14.95 · Buy It Now

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Fluval 50w submersible - fluval,

Fluval 50w submersible - fluval,

£20.29 · Buy It Now

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Aquarium chiller 20l quiet - chiller,

Aquarium chiller 20l quiet - chiller,

£107.09 · Buy It Now

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Aquarium 50w 500w digital - to,

Aquarium 50w 500w digital - to,

£15.54 · Buy It Now

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Versatile mini fish tank - versatile,

Versatile mini fish tank - versatile,

£23.99 · Buy It Now

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Fish tank l - tank, 50

Fish tank l - tank, 50

£104.70 · Buy It Now

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Nicrew fish tank filter - nicrew,

Nicrew fish tank filter - nicrew,

£27.98 · Buy It Now

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Aquarium chiller 20l quiet - aquarium,

Aquarium chiller 20l quiet - aquarium,

£93.64 · Buy It Now

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Betta thermal compact heater - betta,

Betta thermal compact heater - betta,

£12.90 · Buy It Now

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Nicrew slim aquarium - aquarium, filter

Nicrew slim aquarium - aquarium, filter

£19.38 · Buy It Now

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100 200w aquarium water heater - water,

100 200w aquarium water heater - water,

£10.98 · Buy It Now

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Tetratec air pump aquarium - air,

Tetratec air pump aquarium - air,

£18.99 · Buy It Now

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50w fish tank - 50w, aquarium

50w fish tank - 50w, aquarium

£10.25 · Buy It Now

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Live fish transport tank - transport, lake

Live fish transport tank - transport, lake

£104.47 · Buy It Now

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📊96 listings · from £4.95 · avg £39.63
⚠️ These listings were last updated more than 15 days ago. Search for fresh listings

Browse 96 20l fish tank listings currently in our index. Prices range from £4.95 to £151.99, with an average of £39.63. 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 →

Try this: 3 foot aquarium | 3ft fish tank stand | 3ft tank | 4 foot aquarium | 4ft fish tank | 4ft fish tank stand | 50 litre fish tank | 5ft tank | 8ft fish tank | acan coral

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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 £4.95, while premium listings can reach £151.99 — giving you a wide budget spread to work with. The average price of £39.63 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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