How many fish is a good amount for a 20 gallon tank?

Answer 1

The 1 inch per gallon rule is bullcrap. This means I can have a 10 inch pleco in a 10 gallon tank. That's not even physically possible. You have to research different fish, and if they grow to be small enough to fit in your tank, you can put them in, but you can't overcrowd your tank. And overcrowding doesn't mean don't put too many in there because they'll be bumping into each other, it means don't put too many in there or they'll all poison each other.

If you want to start a fishtank, I suggest that you do a lot of research. When I started fishkeeping, I just jumped right in, and I lost many fish because of my foolish wanting. There's a lot of planning that needs to go into a tank, and that doesn't just mean the layout. You have to put in fish that get along with each other. For example, dwarf puffers will attack almost any other fish other than a dwarf puffer, even if the other fish is much larger. So you have to be careful about your choice of fish, as well as the number of fish you put in to your tank.

But if you really want a fishtank after you research how to start one, I would say that you should start with two or three hardy fish after the tank has cycled, and then add more fish every two or more weeks. It's a gradual process to start a fishtank, but it's worth it if you do it right.

Answer 2

Start off for 2-3 to cycle your tank. When its fully cycled you can begin to add 2-3 fish per week untill you reach 1 inch of fish per gallon. So 20 inches of fish total.

Answer 3

For every one inch of fish use a gallon, so if you are going to have 2 inch fish then you could have no more then 10.

Answer 4

start with 1 or 2 and over time you can add up to 15-20 depending on size

Answer 5

I have a 25 gallon tank, with one male Siamese fighter, and 4 danios. you could have all the same species of fish in a small shoal, or a couple of larger ones such as gouramis. Don't get goldfish.

I myself would get 3-4 gouramis as they're really interesting and friendly. and relatively hardy

Answer 6

One inch of fish per each gallon of water is good. You can have up to 20 guppies or 5 - 4" long Guaranis, etc. Divide the size of the fish into the size of the tank...one inch of fish divided into 20 gallons of tank equals 20 little fish.

Always make sure you have enough oxygen being pumped into your tank, too. And, check the PH of and chlorine in your water to avoid "burning" your fish

Remember that certain fish keep growing...no mater how big your tank is...like Oscars and other Cichlid-related fish.

Answer 7

There is no one, simple answer. How big the fish will get, and how good your filtration is, have A LOT to do with this as well as the tank size. That being said, if you are going with average size tropical fish I wouldn't get more than 8. If you ever see the fish all at the surface or the water smells bad those are big warnings the filtration is not adequate. An immediate partial water change is called for.

Answer 8

its best to have 1 gallon of water for every inch of fish, but you have to take in account that the fish will grow, so it's best to take the expected ful growth amount and add it up that way. Then you have to think about what fish liike to be in schools, cause if you only get a couple fish that like to be in schools, then they will all die.

Answer 9

3 fish

Answer 10

It depends on the size of the fish. If you're talking about fish about an inch to 2 inches, the rule is usually 2 fish per gallon.