Are you trying to calculate how many swordtails should be kept together in a fish tank? Want to know how many swordtails can fit in your aquarium? Swordtails are freshwater aquarium fish that can grow up to 4 inches.

The aquarium stocking rule of thumb is 1 gallon for every inch of fish. That means a 4 inch swordtail will require at least 4 gallons. When trying to decide the ideal number of swordtails for your aquarium size, you need to take into account other considerations. Are you housing juvenile swordtails, if so, you can fit more swordtails in one tank but be prepared to transfer your swordtails to a larger tank as they grow. Will you be breeding swordtails, then they will need more space.

We’ve created a Swordtail Tank Size Calculator below to calculate the number of swordtails you can put in your aquarium. It’s best to get the largest tank that fits your space. Your Swordtail will suffer if you overcrowd your aquarium with too many swordtails.

## How Many Swordtails Can Fit in a 10 Gallon Tank?

You can fit 2 adult swordtails in a 10 gallon tank. If you have juvenile swordtails, you can fit 3 juvenile swordtails in a 10 gallon tank. Keep in mind, swordtails breed easily. So be prepared to transfer your swordtails to another aquarium when they start breeding.

## How Many Swordtails Can Fit in a 5 Gallon Tank?

You can fit 1 adult swordtail in a 5 gallon tank. If you have juvenile swordtails, you can fit 1 juvenile swordtail in a 5 gallon tank. Swordtails don’t like being alone, they are social fish. I don’t recommend keeping only one swordtail. You should get at least a minimum 10 gallon tank for your swordtails.

## How Many Swordtails Can Fit in a 20 Gallon Tank?

You can fit 4 adult swordtails in a 20 gallon aquarium. If you have juvenile swordtails, you can fit 6 juvenile swordtails in a 20 gallon tank. Keep in mind, swordtails breed easily. I suggest starting off with less swordtails so there is room for baby swordtails in your 20 gallon tank.

## How Many Swordtails Can Fit in a 29 Gallon Tank?

You can fit 6 adult swordtails in a 29 gallon aquarium. If you have juvenile swordtails, you can fit 8 juvenile swordtails in a 29 gallon tank. Keep in mind, swordtails breed easily. I suggest starting off with less swordtails so there is room for baby swordtails in your tank.

## How Many Swordtails Can Fit in a 30 Gallon Tank?

You can fit 7 adult swordtails in a 30 gallon aquarium. If you have juvenile swordtails, you can fit 9 juvenile swordtails in a 30 gallon tank. Keep in mind, swordtails breed easily. I suggest starting off with less swordtails so there is room for baby swordtails in your 30 gallon tank.

## How Many Swordtails Can Fit in a 55 Gallon Tank?

You can fit 12 adult swordtails in a 55 gallon aquarium. If you have juvenile swordtails, you can fit 16 juvenile swordtails in a 55 gallon tank.

## How Many Swordtails Can Fit in a 40 Litre Tank?

You can fit 2 swordtails in a 40 litre tank. If you have juvenile swordtails, you can fit 3 juvenile swordtails in a 40 litre tank.

## How Many Swordtails Can Fit in a 60 Litre Tank?

You can fit 5 swordtails in a 60 litre tank. If you have juvenile swordtails, you can fit 5 juvenile swordtails in a 60 litre tank.

## What Size Tank Do You Need for 1 Swordtail?

One swordtail will need a minimum of 4.5 gallons (17 litres) per swordtail. This is for adult swordtails. Juvenile swordtails will need a minimum of 3.5 gallons (13.25 litres) per swordtails. Even though that is their minimum requirements, I suggest housing swordtails in at least a 10 gallon fish tank.

## What Size Tank Do You Need for 4 Swordtails?

For four adult swordtails, you need at least a 20 gallon tank. Keep in mind, swordtails breed easily. Be prepared to transfer your swordtails to another aquarium when they start breeding.

## What Size Tank Do You Need for 2 Swordtails?

For two adult swordtails, you need at least a 10 gallon tank. Keep in mind, swordtails breed easily. Be prepared to transfer your swordtails to another aquarium when they start breeding.

## How Many Swordtails Can Fit In Your Aquarium?

Use the Swordtail Tank Size calculator below to compute how many swordtails can fit in your aquarium. Input the Aquarium size and select from the drop down menu the type of swordtail (adult or juvenile).

This calculator is for *Swordtail only* fish tank. If you are creating a community tank with other fish, then you will need to make adjustments by decreasing the number of swordtails to make room for the other fish. You don’t want overcrowding in your fish tank.

## Table: How Many Swordtails Can Fit in Your Aquarium (Gallons)

Aquarium Size (Gallons) | Adult Swordtails | Juvenile Swordtails |

5 Gallons | 1 | 1 |

10 Gallons | 2 | 3 |

20 Gallons | 4 | 6 |

29 Gallons | 6 | 8 |

30 Gallons | 7 | 9 |

55 Gallons | 12 | 16 |

## Table: How Many Swordtails Can Fit in Your Aquarium (Litres)

Aquarium Size (Litres) | Adult Swordtails | Juvenile Swordtails |

40 Litres | 2 | 3 |

60 Litres | 5 | 5 |