For Sale USA

20 gallon fish tank

4

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

Home / Fish & Aquariums / 20 gallon fish tank refurbished & used for sale | For Sale USA
Aquarium stand gallon - aquarium, metal

Aquarium stand gallon - aquarium, metal

$47.70
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Glass gal rectangular fish - 20,

Glass gal rectangular fish - 20,

$20.00
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Gallon glass aquarium fish - 80,

Gallon glass aquarium fish - 80,

$169.69
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Gallon high tall glass - high/tall,

Gallon high tall glass - high/tall,

$25.00
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Gallon long aquarium lid - 20,

Gallon long aquarium lid - 20,

$39.99
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Top fin led - top, hood

Top fin led - top, hood

$43.99
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Aqueon glass gallon long - glass,

Aqueon glass gallon long - glass,

$85.16
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Hoobro gallon fish tank - 20,

Hoobro gallon fish tank - 20,

$48.35
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Gallon glass aquarium tank - aquarium,

Gallon glass aquarium tank - aquarium,

$55.00
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Gallon fish tank stand - gallon,

Gallon fish tank stand - gallon,

$44.88
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Sturdy metal fish tank stand - sturdy,

Sturdy metal fish tank stand - sturdy,

$72.19
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Gallon aquarium stand - gallon,

Gallon aquarium stand - gallon,

$48.15
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Aqueon glass gallon - glass, 20

Aqueon glass gallon - glass, 20

$80.59
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Aqueon standard glass - aqueon,

Aqueon standard glass - aqueon,

$75.00
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Vibrant life nv33922 gallon - vibrant, 20

Vibrant life nv33922 gallon - vibrant, 20

$110.00
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Colorfusion aquarium gallon - colorfusion,

Colorfusion aquarium gallon - colorfusion,

$220.90
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Gallon glass aquarium large - 20,

Gallon glass aquarium large - 20,

$92.99
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Tetra aquarium gallon - tetra, aquarium,

Tetra aquarium gallon - tetra, aquarium,

$132.99
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Gallon aquarium fish tank - 20,

Gallon aquarium fish tank - 20,

$159.54
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Uns 20t gallon - low, iron

Uns 20t gallon - low, iron

$35.00
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Tocretoare fish tank stand - tocretoare,

Tocretoare fish tank stand - tocretoare,

$104.43
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Aqueon glass gallon long - glass,

Aqueon glass gallon long - glass,

$96.86
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Gallon long glass - 20,

Gallon long glass - 20,

$79.16
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Gallon high rimless fish - rimless,

Gallon high rimless fish - rimless,

$66.05
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Top fin ensemble gal glass - fin,

Top fin ensemble gal glass - fin,

$45.00
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Gallon fish tank stand - gallon,

Gallon fish tank stand - gallon,

$53.89
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Imagitarium gal long - imagitarium,

Imagitarium gal long - imagitarium,

$60.00
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Gallon heavy duty - heavy,

Gallon heavy duty - heavy,

$19.95
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Gallon aquarium kit - 🐠,

Gallon aquarium kit - 🐠,

$280.00
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Gallon fish tank - 20-29, stand

Gallon fish tank - 20-29, stand

$88.18
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Waterbox gallon aio full - waterbox, 20

Waterbox gallon aio full - waterbox, 20

$425.00
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Hang back aquarium - hang, filter

Hang back aquarium - hang, filter

$79.19
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Anbaimei gallon aquarium - 20,

Anbaimei gallon aquarium - 20,

$78.29
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Gallon aquarium terrarium - aquarium/,

Gallon aquarium terrarium - aquarium/,

$65.00
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Lifewithpets gallon long - gallon,

Lifewithpets gallon long - gallon,

$25.99
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Aqueon quietflow led - 20, pro

Aqueon quietflow led - 20, pro

$24.99
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Aquarium stand gallon metal - stand,

Aquarium stand gallon metal - stand,

$46.73
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Tetra led aquarium hood - led,

Tetra led aquarium hood - led,

$68.90
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Aquarium lids polycarbonate - aquarium,

Aquarium lids polycarbonate - aquarium,

$50.00
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Gallon long glass - long,

Gallon long glass - long,

$94.99
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Marina gallon led aquarium - 20,

Marina gallon led aquarium - 20,

$165.00
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Gallon fish tank stand - 55-90,

Gallon fish tank stand - 55-90,

$189.99
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Custom solid polycarbonate - custom,

Custom solid polycarbonate - custom,

$110.00
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Glass rectangle - glass, (standard)

Glass rectangle - glass, (standard)

$35.00
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Gallon high rimless fish - 20,

Gallon high rimless fish - 20,

$58.52
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Gallon fish tank - gallon, stand

Gallon fish tank - gallon, stand

$55.20
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Aqqa gallon fish - aqqa, tank

Aqqa gallon fish - aqqa, tank

$130.67
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Gallon fish tank stand - gallon,

Gallon fish tank stand - gallon,

$125.99
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Gallon fish tank stand - gallon,

Gallon fish tank stand - gallon,

$48.35
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Hygger 600 gal silent air - silent, pump

Hygger 600 gal silent air - silent, pump

$28.99
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Aquarium lid polycarbonate - aquarium,

Aquarium lid polycarbonate - aquarium,

$72.65
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Mahancris gallon fish - 20-29,

Mahancris gallon fish - 20-29,

$118.99
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Heavy duty 400lbs aquarium - heavy-duty,

Heavy duty 400lbs aquarium - heavy-duty,

$47.20
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Gallon glass rectangular - 20,

Gallon glass rectangular - 20,

$85.00
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Aquarium stand gallon - aquarium, 20

Aquarium stand gallon - aquarium, 20

$47.46
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Aqua culture gallon - 20,

Aqua culture gallon - 20,

$30.00
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Crystal rimless aquarium - crystal, –

Crystal rimless aquarium - crystal, –

$243.21
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Gallon fish tank stand - gallon,

Gallon fish tank stand - gallon,

$114.39
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Aquarium lid gallon high - aquarium, 20

Aquarium lid gallon high - aquarium, 20

$21.99
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Gallon fish tank - tank, stand

Gallon fish tank - tank, stand

$283.98
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Gallon fish tank stand - gallon,

Gallon fish tank stand - gallon,

$60.86
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New wood grain - new,

New wood grain - new,

$39.99
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Gallon fish tank stand 3 - stand,,

Gallon fish tank stand 3 - stand,,

$88.82
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Fish tank stand gallon - tank, 40

Fish tank stand gallon - tank, 40

$94.49
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Gallon fish tank stand - gallon,

Gallon fish tank stand - gallon,

$46.14
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Gallon fish tank - gallon, w/

Gallon fish tank - gallon, w/

$57.70
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Aqueon glass gallon long - glass, 20

Aqueon glass gallon long - glass, 20

$97.86
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Sturdy metal aquarium stand - aquarium,

Sturdy metal aquarium stand - aquarium,

$50.26
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Aquarium air pump kit - aquarium,

Aquarium air pump kit - aquarium,

$12.98
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Multi layer aquarium filter - aquarium,

Multi layer aquarium filter - aquarium,

$26.99
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Lifegard gallon rimless - gallon,

Lifegard gallon rimless - gallon,

$174.31
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Top fin led aquarium - led,

Top fin led aquarium - led,

$42.99
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Fish tank water filter pump - filter,

Fish tank water filter pump - filter,

$58.89
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Gallon fish tank - 20-29,

Gallon fish tank - 20-29,

$122.94
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Gallon fish tank stand with - gallon,

Gallon fish tank stand with - gallon,

$132.99
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Gallon fish tank stand - gallon,

Gallon fish tank stand - gallon,

$116.99
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Aqueon deluxe aquarium led - aquarium,

Aqueon deluxe aquarium led - aquarium,

$39.99
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Aquarium stand 29 - 20-29, gallon

Aquarium stand 29 - 20-29, gallon

$114.99
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Gallon aquarium stand metal - 29,

Gallon aquarium stand metal - 29,

$72.19
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H2pro glass canopy 20 - 30",

H2pro glass canopy 20 - 30",

$52.45
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Glass canopy lid for - canopy, 20

Glass canopy lid for - canopy, 20

$75.99
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Mondazie gallon fish - 10-20,

Mondazie gallon fish - 10-20,

$59.37
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Aqueon led deluxe fish - deluxe, tank

Aqueon led deluxe fish - deluxe, tank

$59.79
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Gallon fish tank stand - tank,

Gallon fish tank stand - tank,

$44.84
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Gallon fish tank stand - gallon,

Gallon fish tank stand - gallon,

$76.99
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Uneak xxl shipwreck aquarium - shipwreck,

Uneak xxl shipwreck aquarium - shipwreck,

$208.56
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Polycarbonate aquarium lid - polycarbonate,

Polycarbonate aquarium lid - polycarbonate,

$89.19
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Gallon aquarium set - gallon,

Gallon aquarium set - gallon,

$163.99
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Bio sponge filter - sponge,

Bio sponge filter - sponge,

$8.99
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Aquaneat aquarium air pump 20 - aquarium, pump,

Aquaneat aquarium air pump 20 - aquarium, pump,

$10.35
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Gallon fish tank - gallon, kit

Gallon fish tank - gallon, kit

$70.71
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Tetra led aquarium - led, in

Tetra led aquarium - led, in

$58.50
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Gallon fish tank - gallon,

Gallon fish tank - gallon,

$43.59
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Gallon glass aquarium - 20, 24

Gallon glass aquarium - 20, 24

$102.37
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Epoxy aquarium - epoxy,

Epoxy aquarium - epoxy,

$50.00
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Aquarium lid polycarbonate - aquarium,

Aquarium lid polycarbonate - aquarium,

$94.88
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Looking for more 20 gallon fish tank?

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📊96 listings · from $8.99 · avg $85.37
⚠️ These listings were last updated more than 12 days ago. Search for fresh listings

Browse 96 20 gallon fish tank listings currently in our index. Prices range from $8.99 to $425, with an average of $85.37. 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 20 gallon fish tank →

Try this: 30 gallon fish tank | 50 gallon fish tank | 55 gallon fish tank | 75 gallon fish tank | acrylic aquarium | ada aquarium | aquarium hood | aquarium stand | aquarium canopy | biorb

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Everything you need to know about 20 gallon fish tank

Whether you are looking for a brand-new or second-hand 20 gallon 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 $8.99, while premium listings can reach $425 — giving you a wide budget spread to work with. The average price of $85.37 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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