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 with - aquarium,

20l aquarium fish tank with - aquarium,

£29.59 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish - fish, with

20l aquarium fish - fish, with

£29.99 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish tank - aquarium, with

20l aquarium fish tank - aquarium, with

£29.99 · Buy It Now

» View details on eBay #sponsored
Aquarium heater submersible - heater,

Aquarium heater submersible - heater,

£12.99 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish - 20l, with

20l aquarium fish - 20l, with

£29.99 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish - aquarium, with

20l aquarium fish - aquarium, with

£29.59 · Buy It Now

» View details on eBay #sponsored
Fluval 20l betta - fluval, fish

Fluval 20l betta - fluval, fish

£99.99 · Buy It Now

» View details on eBay #sponsored
Fluval 20l betta aquarium - fluval,

Fluval 20l betta aquarium - fluval,

£99.99 · Buy It Now

» View details on eBay #sponsored
Superfish white led panorama - superfish,

Superfish white led panorama - superfish,

£54.99 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish tank with - aquarium,

20l aquarium fish tank with - aquarium,

£30.99 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish tank - fish,

20l aquarium fish tank - fish,

£40.29 · Buy It Now

» View details on eBay #sponsored
Stainless steel aquarium - stainless,

Stainless steel aquarium - stainless,

£11.04 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish tank - fish, with

20l aquarium fish tank - fish, with

£40.29 · Buy It Now

» View details on eBay #sponsored
Hidom submersible tropical - hidom,

Hidom submersible tropical - hidom,

£10.95 · Buy It Now

» View details on eBay #sponsored
Pawhut 50l glass turtle - pawhut,

Pawhut 50l glass turtle - pawhut,

£81.99 · Buy It Now

» View details on eBay #sponsored
20l led aquarium includes - 20l,

20l led aquarium includes - 20l,

£54.78 · Buy It Now

» View details on eBay #sponsored
Fluval betta 20l - betta,

Fluval betta 20l - betta,

£79.99 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish tank - fish, with

20l aquarium fish tank - fish, with

£47.99 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish tank with - fish,

20l aquarium fish tank with - fish,

£40.29 · Buy It Now

» View details on eBay #sponsored
Fluval betta aquarium kit - aquarium,

Fluval betta aquarium kit - aquarium,

£99.99 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish tank - 20l,

20l aquarium fish tank - 20l,

£47.99 · Buy It Now

» View details on eBay #sponsored
Nicrew slim aquarium - nicrew,

Nicrew slim aquarium - nicrew,

£17.47 · Buy It Now

» View details on eBay #sponsored
Lid feed cover for - cover, fluval

Lid feed cover for - cover, fluval

£10.99 · Buy It Now

» View details on eBay #sponsored
20l aquarium fish - fish, with

20l aquarium fish - fish, with

£29.69 · Buy It Now

» View details on eBay #sponsored
Fish fun heater thermostat - r,

Fish fun heater thermostat - r,

£11.45 · Buy It Now

» View details on eBay #sponsored
50w 500w led - 50w-500w, aquarium

50w 500w led - 50w-500w, aquarium

£12.17 · Buy It Now

» View details on eBay #sponsored
Fish tank aqurium small 1 - fish, 6

Fish tank aqurium small 1 - fish, 6

£7.19 · Buy It Now

» View details on eBay #sponsored
50w 500w led digital - 50w-500w,

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

£16.07 · Buy It Now

» View details on eBay #sponsored
Aquarium chiller - aquarium,

Aquarium chiller - aquarium,

£111.31 · Buy It Now

» View details on eBay #sponsored
200 300 500w led digital - 200/300/500w,

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

£15.55 · Buy It Now

» View details on eBay #sponsored
Superfish aquaflow aquarium - superfish,

Superfish aquaflow aquarium - superfish,

£14.99 · Buy It Now

» View details on eBay #sponsored
Aquarium fish tank - aquarium, heater

Aquarium fish tank - aquarium, heater

£15.61 · Buy It Now

» View details on eBay #sponsored
Alfagrog e25 ceramic filter - alfagrog,

Alfagrog e25 ceramic filter - alfagrog,

£32.95 · Buy It Now

» View details on eBay #sponsored
Pawhut turtle tank - tank, 50l

Pawhut turtle tank - tank, 50l

£59.99 · Buy It Now

» View details on eBay #sponsored
Aquarium fish tank heater - fish,

Aquarium fish tank heater - fish,

£15.44 · Buy It Now

» View details on eBay #sponsored
Aquarium 50w 500w - aquarium, to

Aquarium 50w 500w - aquarium, to

£15.97 · Buy It Now

» View details on eBay #sponsored
50w 500w led digital - digital, aquarium

50w 500w led digital - digital, aquarium

£17.16 · Buy It Now

» View details on eBay #sponsored
Fluval premium betta aquarium - fluval,

Fluval premium betta aquarium - fluval,

£119.99 · Buy It Now

» View details on eBay #sponsored
Quiet fish tank filter - quiet,

Quiet fish tank filter - quiet,

£24.79 · Buy It Now

» View details on eBay #sponsored
Superfish aqua flow filter - superfish,

Superfish aqua flow filter - superfish,

£14.99 · Buy It Now

» View details on eBay #sponsored
Fluval aquarium heater - aquarium,

Fluval aquarium heater - aquarium,

£22.49 · Buy It Now

» View details on eBay #sponsored
Nicrew slim aquarium filter - nicrew,

Nicrew slim aquarium filter - nicrew,

£17.66 · Buy It Now

» View details on eBay #sponsored
Black aqua one betta - betta, due

Black aqua one betta - betta, due

£99.99 · Buy It Now

» View details on eBay #sponsored
Aquael plastic ultra heater - plastic,

Aquael plastic ultra heater - plastic,

£29.95 · Buy It Now

» View details on eBay #sponsored
Pond koi filter media bio - koi,

Pond koi filter media bio - koi,

£69.99 · Buy It Now

» View details on eBay #sponsored
200 300 500w led - 200/300/500w, digital

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

£15.66 · Buy It Now

» View details on eBay #sponsored
Vislone 70w 20l small fish - 70w,

Vislone 70w 20l small fish - 70w,

£78.97 · Buy It Now

» View details on eBay #sponsored
Heavy duty wood aquarium stand - heavy,

Heavy duty wood aquarium stand - heavy,

£50.13 · Buy It Now

» View details on eBay #sponsored
Nicrew slim aquarium filter - nicrew,

Nicrew slim aquarium filter - nicrew,

£18.96 · Buy It Now

» View details on eBay #sponsored
Fluval series aquarium - fluval, t

Fluval series aquarium - fluval, t

£26.99 · Buy It Now

» View details on eBay #sponsored
New electric water chiller - water,

New electric water chiller - water,

£101.96 · Buy It Now

» View details on eBay #sponsored
Submersible aquarium heater - submersible,

Submersible aquarium heater - submersible,

£15.54 · Buy It Now

» View details on eBay #sponsored
Small aquarium internal filter - small,

Small aquarium internal filter - small,

£9.95 · Buy It Now

» View details on eBay #sponsored
Fluval betta 20l - fluval,

Fluval betta 20l - fluval,

£124.99 · Buy It Now

» View details on eBay #sponsored
Aquarium 50w 500w digital - to,

Aquarium 50w 500w digital - to,

£14.75 · Buy It Now

» View details on eBay #sponsored
Nicrew slim aquarium filter - nicrew,

Nicrew slim aquarium filter - nicrew,

£19.34 · Buy It Now

» View details on eBay #sponsored
200 300 500w led - 200/300/500w, digital

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

£16.21 · Buy It Now

» View details on eBay #sponsored
Aquael shrimp tank - d&n,

Aquael shrimp tank - d&n,

£103.99 · Buy It Now

» View details on eBay #sponsored
Nicrew slim aquarium - nicrew,

Nicrew slim aquarium - nicrew,

£18.99 · Buy It Now

» View details on eBay #sponsored
Submersible aquarium heater - aquarium,

Submersible aquarium heater - aquarium,

£16.01 · Buy It Now

» View details on eBay #sponsored
Aquarium 50w 500w digital - 50w, to

Aquarium 50w 500w digital - 50w, to

£16.62 · Buy It Now

» View details on eBay #sponsored
Interpet bioactive tap - bioactive,

Interpet bioactive tap - bioactive,

£4.95 · Buy It Now

» View details on eBay #sponsored
Aquarium nordic 6mm - -,

Aquarium nordic 6mm - -,

£27.75 · Buy It Now

» View details on eBay #sponsored
50w 500w led digital - led,

50w 500w led digital - led,

£16.26 · Buy It Now

» View details on eBay #sponsored
Aquarium chiller - chiller,

Aquarium chiller - chiller,

£113.68 · Buy It Now

» View details on eBay #sponsored
Oase bioplus thermo - bioplus,

Oase bioplus thermo - bioplus,

£31.95 · Buy It Now

» View details on eBay #sponsored
Marina air pump - air, flow

Marina air pump - air, flow

£10.99 · Buy It Now

» View details on eBay #sponsored
Aaquarium chiller aquarium - chiller,

Aaquarium chiller aquarium - chiller,

£97.46 · Buy It Now

» View details on eBay #sponsored
100w aquarium heater - 100w,

100w aquarium heater - 100w,

£14.99 · Buy It Now

» View details on eBay #sponsored
Superfish aqua flow - aqua, 50

Superfish aqua flow - aqua, 50

£12.50 · Buy It Now

» View details on eBay #sponsored
Fish tank filter - filter,, internal

Fish tank filter - filter,, internal

£18.28 · Buy It Now

» View details on eBay #sponsored
Ciano internal aquarium power - aquarium,

Ciano internal aquarium power - aquarium,

£19.79 · Buy It Now

» View details on eBay #sponsored
Boxtech mini aquarium sponge - boxtech,

Boxtech mini aquarium sponge - boxtech,

£14.19 · Buy It Now

» View details on eBay #sponsored
Tetra tetratec air - tetra, 50

Tetra tetratec air - tetra, 50

£15.97 · Buy It Now

» View details on eBay #sponsored
Aquarium 50w 500w digital - aquarium,

Aquarium 50w 500w digital - aquarium,

£17.90 · Buy It Now

» View details on eBay #sponsored
Pro aquarium co2 system - aquarium,

Pro aquarium co2 system - aquarium,

£151.99 · Buy It Now

» View details on eBay #sponsored
Silver aquarium fish tank - fish, sand

Silver aquarium fish tank - fish, sand

£28.99 · Buy It Now

» View details on eBay #sponsored
Hidom aquarium heater - aquarium,

Hidom aquarium heater - aquarium,

£10.95 · Buy It Now

» View details on eBay #sponsored
Aquarium led light clip - aquarium, 6w

Aquarium led light clip - aquarium, 6w

£11.89 · Buy It Now

» View details on eBay #sponsored
Nicrew internal aquarium - nicrew,

Nicrew internal aquarium - nicrew,

£21.24 · Buy It Now

» View details on eBay #sponsored
Fish tank filter - tank, filter,

Fish tank filter - tank, filter,

£19.36 · Buy It Now

» View details on eBay #sponsored
20l 35l electric - 20l/35l, chiller

20l 35l electric - 20l/35l, chiller

£101.82 · Buy It Now

» View details on eBay #sponsored
Hagen marina submersible - hagen,

Hagen marina submersible - hagen,

£14.95 · Buy It Now

» View details on eBay #sponsored
Fluval 50w submersible - fluval,

Fluval 50w submersible - fluval,

£20.29 · Buy It Now

» View details on eBay #sponsored
Aquarium chiller 20l quiet - chiller,

Aquarium chiller 20l quiet - chiller,

£107.09 · Buy It Now

» View details on eBay #sponsored
Aquarium 50w 500w digital - aquarium,

Aquarium 50w 500w digital - aquarium,

£15.54 · Buy It Now

» View details on eBay #sponsored
Versatile mini fish tank - mini,

Versatile mini fish tank - mini,

£23.99 · Buy It Now

» View details on eBay #sponsored
Fish tank l - fish,

Fish tank l - fish,

£104.70 · Buy It Now

» View details on eBay #sponsored
Nicrew fish tank filter - tank,

Nicrew fish tank filter - tank,

£27.98 · Buy It Now

» View details on eBay #sponsored
Aquarium chiller 20l quiet - 20l,

Aquarium chiller 20l quiet - 20l,

£93.64 · Buy It Now

» View details on eBay #sponsored
Betta thermal compact - compact, heater

Betta thermal compact - compact, heater

£12.90 · Buy It Now

» View details on eBay #sponsored
Nicrew slim aquarium filter - slim,

Nicrew slim aquarium filter - slim,

£19.38 · Buy It Now

» View details on eBay #sponsored
100 200w aquarium - 100-200w, water

100 200w aquarium - 100-200w, water

£10.98 · Buy It Now

» View details on eBay #sponsored
Tetratec air pump - tetratec, aquarium

Tetratec air pump - tetratec, aquarium

£18.99 · Buy It Now

» View details on eBay #sponsored
50w fish tank aquarium heater - tank,

50w fish tank aquarium heater - tank,

£10.25 · Buy It Now

» View details on eBay #sponsored
Live fish transport tank lake - tank,

Live fish transport tank lake - tank,

£104.47 · Buy It Now

» View details on eBay #sponsored

Looking for more 20l fish tank?

Search eBay live — fresh results filtered for the best value, updated every hour.

🔍 Search live deals
📊96 listings · from £4.95 · avg £39.63
⚠️ These listings were last updated more than 18 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

Shop by budget

< £25 £25 – £50 £50 – £100 £100 – £200 £200 – £500 > £500

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.

🔍 20l fish tank Search live on eBay