What kind of fish can live in a 20 gallon long tank?

Answer 1

There are 20 gallon tall tanks....standard 20 gallon tanks are known as 20 longs to help differentiate.

20 gallon tanks are very versatile, you can keep quite a variety of fish, kinda depends what you are interested in. Any of the livebearers would do well, and there is an amazing variety to choose from. Dwarf cichlids (apistogramma sp., rams, curviceps from Central/South America, as well as any of the shelldwellers or even a pair of one of the Neolamprologus sp. from Africa). You could also do a cool community tank in a 20. Some of your favorite tetras, rasboras, etc. to do the "schooling" thing, then a couple of other fish, maybe in contrasting colors to your tetras....any of the dwarf gouramis, rainbowfish, etc. (nothing too big!)

A school of about 10 or so cory cats would be really neat in a 20 gallon also. People often classify these fish as scavengers, just because they feed off the bottom, but they really deserve a break. They are very interesting little fish in their own right, and do best when in decent sized groups. You will be amazed at how they play and swim around with each other....very active, social little fish!

Answer 2

A 20 gallon long is an excellent tank - the long, low profile lets you keep a better variety (and slightly more fish) than the standard or tall versions of the same size tank.

There are too many types of fish that you could keep to list them all here. Livebearers are good (and colorful) and will probably breed in the tank. So would a small pair of convict cichlids, although a 30 gallon would be a better size for them full grown. Tetras a another colorful choice with lots of varieties, as are danios, dwarf gouramis, and rainbowfish. Here are a few links where you can see photos of these and get ideas for what is compatible with others. Just be careful not to mix peaceful and aggressive types and not to overstock your tank. Some species do better when in schools of 6+, so keep this in mind when selecting.

http://www.elmersaquarium.com/h701elmers_freshwater_handbook.htm
http://www.liveaquaria.com/product/categ.cfm?pcatid=830

Answer 3

Common Glass Aquarium Sizes

5.5 Gallon 16x8x10 (128 sq. in.)
10 Leader 20x10x12 (200 sq. in.)
10 Hexagon 14x12x18 (127 sq. in)
15 Gallon 24x12x12 (288 sq. in.)
20 High 24x12x16 (288 sq. in.)
20 Long 30x12x12 (360 sq. in.)
25 Gallon 24x12x20 (288 sq. in.)
29 Gallon 30x12x18 (360 sq. in.)
30 Gallon 36x12x16 (432 sq. in.)
30 Breeder 36x18x12 (648 sq. in.)
33 Long 48x13x12 (624 sq. in.)
37 Gallon 30x12x22 (360 sq. in.)
38 Gallon 36x12x20 (432 sq. in.)
40 Long 48x13x16 (624 sq. in.)
40 Breeder 36x18x16 (648 sq. in.)
45 Gallon 36x12x24 (360 sq. in.)
50 Gallon 36x18x18 (648 sq. in.)
55 Gallon 48x13x20 (624 sq. in.)
65 Gallon 36x18x24 (648 sq. in.)
Petite body fish
1” per gallon or 1” per 12 sq. in. of surface
For example 20 long has 360 sq. in. surface area
360/12=30
Can a 20 long support 30” of fish? Probably not.
A 20 high has only 288 sq. in. surface area
288/12=24
Can a 20 long support 20” of fish? Probably not.
A 25 is also 288 sq. in. surface area
288/12=24
Can a 25 support 24” of fish. Probably.
I like to average the two for a more accurate capacity.
For the 20 long, 30 by surface area, 20 by volume averages to 25”
Can a 20 long support 25” of fish? Probably.
For the 20 high, 24 by surface area, 20 by volume averages to 22”
Can a 20 high support 22” of fish? Probably.
Why does the 20 long support 3” more fish that the 20 high?
A larger surface area allows a greater oxygen exchange, which is as important as volume of water.
Large bodied fish, such as gold fish you need to double or even triple these numbers, i.e. 3 gallons per inch and 36 sq. in. of surface per 1” of fish.
This is not the only consideration for fish tanks. Types of fish will appreciate one type of tank over another. For example, fast swimmers like Zebra Danios, Pearl Danios and Blue Danios will do best in a tank that is at least 30” long. They would be better kept in a 20 long rather than a 25. Giant Danios would do best in a tank at least 48” long. They would be better kept in a 55 rather than a 65.
On the other hand, slow, tall bodied fish like Angel Fish and Discus will do best in a deep tank. They would be better kept in a 65 rather than a 55. They, like other cichlids also need a bit more than the 1” per gallon and/or 12 sq. in. surface.

Answer 4

There are many types of fish that can live in your 20 gallon tank.I have two 20 gallon tanks one with 3 pictus catfish and a upsidedown catfish and the other with 3 African cichlids.Do some research on the fish you like and good luck.

Answer 5

Many, I would personally do some type of livebearer

Answer 6

None. There is no such thing as a 20 gallon long tank.

Answer 7

NEON TETRAS