Asked by: Decorosa Amilibia
pets fish and aquariums

What fish can go in 20 gallon tank?

Last Updated: 16th March, 2020

Top 10 Fish for a 20-Gallon Aquarium
  • Platy.
  • Swordtail.
  • Molly Fish.
  • Cory Catfish.
  • Dwarf Gourami.
  • Neon Tetra.
  • Zebra Danio.
  • Fancy Guppy.

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Hereof, how many fish can I have in a 20 gallon tank?

Basing on the rule "1 inch fish per gallon of water", a tank with 20 gallons of water can accommodate twenty of 1 inch fish.

Similarly, what can I put in a 20 gallon long tank? A single betta, or two schools of small fish (such as guppies, tetras, or cory cats) could be housed in a 20 gallon tank. A crayfish or a few crabs (such as red claw crabs, Halloween crabs, or hermit crabs) would be another possibility.

Also to know is, what is the biggest fish you can put in a 20 gallon tank?

A Keyhole cichlid should be okay for a the long 20 gallon. You could do Tbar cichlid also. the tank is 20 gallons not 20 inches or centimetres, most often they are 24 inches long and 10-12 inches wide and often 18 inches high.

How many goldfish can I put in a 20 gallon tank?

The general rule of thumb for goldfish is actually 20 gallons for the first goldfish and 10 gallons for each additional fish so four goldfish would actually need a 50 gallon tank as opposed to a 40.

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Marla Rubin De Celis


What is the size of 20 gallon fish tank?

Aquarium Weights & Sizes
20 gallon High 24" x 12" x 16" 225 lbs
20 gallon Long 30" x 12" x 12" 225 lbs
25 gallon 24" x 12" x 20" 282 lbs
29 gallon 30" x 12" x 18" 330 lbs

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What's the lucky number for fish?

Most feng shui practitioners agree that the number nine is the most auspicious number, so it's no wonder that this is the favored number of fish for your tank or aquarium. The number nine is the number for prosperity, which symbolizes your wealth having a long life span.

Yanfeng Prim


How often should you clean a 20 gallon fish tank?

A partial water change once a week is a good starting place. If the aquarium is overcrowded or if you are feeding the fish too much, partial water changes should be done more frequently, for example 25 or 30 percent every four days.

Louella Easton


Which pet fish live the longest?

If you are looking for a fish that will be around for up to 10 years, think about neon tetras, angelfish, Oscars, and plecostomus. The longest lived of all the popular freshwater fish is the goldfish. If provided proper feeding and a clean, healthy environment, these fish can live up to 15 years.

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Do fishes pee?

Fish urinate either through their gills or through a "urinary pore." The latter eliminates urine that has been filtered via the kidneys. Saltwater varieties excrete most urine through the gills, while freshwater fish do so through the urinary pore. Freshwater fish have to get rid of all the water they take in.

Sana Echeverria-Loyzu


How many female bettas can I keep in a 20 gallon tank?

Would 5 female bettas get along and fit in a 20 gallon aquarium? They would probally be fine. I think that would be enough room as long as it is a long and not a tall tank. Also before you put them in you need to make sure you have LOTS of hiding places among plants and caves just in case there is a problem.

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How many guppies can you have in a 20 gallon tank?

The rule of thumb a lot of people use is adding 3 guppies to per 10 gallons of fish tank. So if you have a 20 gallon tank, that's a tank size of 20 gallons. Some may disagree but it's a general standard used in the guppy fish groups.

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What can you do with a 20 gallon tank?

Twenty-gallon aquariums are suitable for a variety of small rodents, including hamsters, gerbils and mice. You must use a mesh aquarium lid for optimal ventilation, but aquariums are more secure than wire cages. By adding a wire cage to the top of the aquarium, you can offer more room for exploration and exercise.

Zarina Bakinoff


How many angelfish can you have in a 20 gallon tank?

I keep 6 angels in a 20-gallon tank.

Cala Biel


How many Swordtails are in a 20 gallon tank?

So I recently bought a 20 gallon tank (high) and I have 3 swordtails in it right now. They are currently about 2 inches long and quite happy in their home.

Rosiane Bertelsmeier


How many tetras can I put in a 20 gallon tank?

The thumb rule to follow for neon tetras is for a 1 gallon per 1 inch long tetra fish. So 20 gallons tank typically means 20 tetras. And Yes you can mix the two black and red tetras half and half - with thumb rule being followed.

Emmanuela Menche


How many cardinal tetras can you have in a 20 gallon tank?

I currently have 14 Cardinals in my 20 gal. Two are mature, about 1.5 inches, the rest are juvenile, under 1". They've been in the tank for a week now and look like they're doing fine.

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Mankilef Liso


How big is a 25 gallon fish tank?

Aquarium Sizes
Tank Size Outside Dimensions in Inches (L x W x H) Weight Empty and Full (lbs)
30 X-High 24 1/4 x 12 1/2 x 24 3/4 41
20 Long 30 1/4 x 12 1/2 x 12 3/4 25
29 Gallon 30 1/4 x 12 1/2 x 18 3/4 40
37 Gallon 30 1/4 x 12 1/2 x 223/4 45

Arica Lozano


How many Mollies Can I put in a 20 gallon tank?

How many Molly Fish can live in a 20-gallon tank? If a 20-gallon aquarium is the largest tank you can afford, then you should plan on purchasing up to 4 to 6 Molly Fish. You may also be able to add a couple of snails or bottom feeder fish in the tank.

Xiaoli Kiesgen


How much gravel do I need for a 20 gallon tank?

Based on our previous requirement of 1 pound of gravel per gallon of water, this means that you will need roughly 20 pounds of gravel substrate for a 20 gallon fish tank.

Chamaida Para


How heavy is a 20 gallon aquarium?

Mid-Sized Aquariums
Medium Aquariums
Tank Size L x W x H Filled Weight
20-gallon (high) 24" x 12" x 16" 225 lbs.
20-gallon (long) 30" x 12" x 12" 225 lbs.
25-gallon 24" x 12" x 20" 282 lbs.

Wencesla Holtbrugger


How long is a 20 gallon long tank?

20 Gallon Long Aquarium Dimensions
A 20 gallon long tank will have a base that is slightly longer than regular 20 gallon tanks. Usually they will measure 30 inches in length, and 12 inches in width and height (30x12x12 inches).

Sha Leonardi


What you need for a 20 gallon aquarium?

Fish Tank Supplies:
  • 20 Gallon Fish Tank (Starter Kit or Empty Tank)
  • 20 Gallon Stand.
  • Fish Tank Lid (in Starter Kit)
  • Day/Night Tank Light (this is the one I have… it has a remote for night time!)
  • Water Filter (in Starter Kit)
  • Water Heater (in Starter Kit)
  • Substrate (Sand, Gravel or None)