Are you setting up a new aquarium and wondering how many fish can fit in a 10 gallon tank? The rule of thumb for determining aquarium stocking level is a gallon of water can hold one fish that is 1 inch long. **That means, in a 10 gallon tank, it can be stocked with 10 one-inch fish. **

However, that is just a rule of thumb, there are factors that can affect the number of fish in a 10 gallon tank.

**Adult Size:** You need to find out the adult size of the fish you are buying so you can base your calculation on the adult fish size and not the juvenile fish size.

**Water Quality:** You can stock more fish in a well-maintained aquarium with high performing filtration system where the fish are fed sparingly. That’s why when you go to pet stores, you will see many fish crammed into a small 10 gallon tank. They can do it because they are keeping the water quality at optimal condition by changing water very frequently and having high performing filtration system.

**Breeding Fish:** If you are planning to breed fish or you know you are getting fish that breeds very easily, you should get less fish than the prescribed 1 gallon per 1 inch. This is to avoid overcrowding in your fish tank once breeding starts.

## How Many Fish can Fit in 10 Gallon Tank?

As a rule of thumb, you can fit 10 one inch fish per 10 gallon tank. Below you will find a calculator to help you to determine how many fish you can stock in a 10 gallon tank.

## How Many Tetras in a 10 Gallon Tank?

You can fit 7-10 tetras in a 10 gallon tank. Tetras are small schooling and number of tetras that fits in a 10 gallon tank will depend on the exact type of tetra. Below is a table showing the number of tetras that can go in a 10 gallon fish tank.

Type of Tetra | Number of Tetras in a 10 Gallon Tank |
---|---|

Cardinal Tetra | 8 Cardinal Tetras in a 10 gallon tank |

Ember Tetra | 10 Ember Tetra in a 10 gallon tank |

Gold Tetra | 7 Gold Tetra per 10 gallon tank |

Lemon Tetra | 7 Lemon Tetra per 10 gallon tank |

Neon Tetra | 7 Neon Tetra per 10 gallon tank |

Rummy Nose Tetra | 7 Rummy Nose Tetra per 10 gallon tank |

X-Ray Tetra | 7 X-Ray Tetra in a 10 gallon tank |

## How Many Danios in a 10 Gallon Tank?

You can fit 6-10 Danios in a 10 gallon tank. The number of danios in a 10 gallon tank depends on the type of danios. Celestial Pearl Danios (also called Galaxy Rasboras) are small fish that does well in 10 gallon tank. They grow only to around 1 inch long. You can stock 10 Celestial Pearl Danios in a 10 gallon fish tank.

Zebra danios is another fish that will do well in a 10 gallon tank. You can stock 6 Zebra Danios in a 10 gallon fish tank.

Types of Danios | Number of Danios in a 10 Gallon Tank |
---|---|

Celestial Pearl Danios | 10 Celestial Pearl Danios in a 10 gallon tank |

Zebra Danios | 6 Zebra Danios in a 10 gallon tank |

## How Many Goldfish in a 10 Gallon Tank?

You can fit 2 goldfish in a 10 gallon tank. Goldfish can grow big and are very messy eater. They also produce a lot of waste so it’s best to keep only 2 goldfish per 10 gallon tank.

## How Many Guppies in a 10 Gallon Tank?

You can fit 7 guppies in a 10 gallon fish tank. I’d get 2 males and 5 female guppies. However, guppies breed very easily so be prepared to move some guppies out once the breeding start to avoid overcrowding. Otherwise, you can start with less guppies, get 4 guppies in your 10 gallon fish tank (1 male and 3 females).

## How Many Swordtails in a 10 Gallon Tank?

You can fit 4 swordtails in a 10 gallon fish tank. I’d get 1 male and 3 female swordtails. Do know that swordtails breed easily so you will get more fish in your tank, be prepared to move some once they start breeding to avoid overcrowding.

## How Many Mollies in a 10 Gallon Tank?

You can fit 4 mollies in a 10 gallon tank. Get 1 male and 3 female mollies. Similar to guppies and swordtails, mollies breed easily so be prepared to move some out once breeding starts to avoid overcrowding.

## How Many Platies in a 10 Gallon Tank?

You can fit 5 platies in a 10 gallon tank. Get 2 males and 3 female platies. Similar to guppies and swordtails, platies breed easily so be prepared to move some out once breeding starts to avoid overcrowding.

## How Many White Cloud Mountain Minnows in a 10 Gallon Tank?

You can fit 8 White Cloud Mountain Minnows in a 10 gallon tank. These are hardy, schooling fish that are great for beginners.

## How Many Corydoras (Cory Cats) in a 10 Gallon Tank?

You can fit 5 Corydoras (Cory Cats) in a 10 gallon fish tank. Cory cats like to be in a group. They are bottom dwellers. If you want to mix Cory cats with other tankmates, you will have to reduce the number of Cory Cats to make room for tankmates.

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