Aquarium Calculator: How Many Gallons Can Your Tank Hold?

This is a small tank... So small in fact that it is unsuitable for most fish!

These tanks and bowls are often sold at bulk retailers by "experts" who will claim they are more than suitable for a single betta (they aren't)

Believe it or not, these small aquariums are actually the most difficult to keep and are unsuitable for beginners - good filtration is essential!

I recommend that any fish tank that is less than 10 gallons should only be considered by experienced aquarists who understand the risks and shortcomings of these tiny tanks, as well as how to overcome them.

This is a small tank... So small in fact that it is unsuitable for most fish!

These tanks and bowls are often sold at bulk retailers by "experts" who will claim they are more than suitable for a single betta (they aren't)

Believe it or not, these small aquariums are actually the most difficult to keep and are unsuitable for beginners - good filtration is essential!

I recommend that any fish tank that is less than 40 Liters should only be considered by experienced aquarists who understand the risks and shortcomings of these tiny tanks, as well as how to overcome them.

This is a mid-sized tank...

Perfect for beginners. Not so small that water quality is difficult to maintain but not so large that cleaning is a big hassle.

These tanks are large enough to house a wide range of fish, provided you are careful to research compatible fish that won't outgrow your tank.

30 - 75 gallons - This is a great starting size for a good marine or salt water tank.

This is a Mid-sized tank...

Perfect for beginners. Not so small that water quality is difficult to maintain but not so large that cleaning is a big hassle.

These tanks are large enough to house a wide range of fish, provided you are careful to research compatible fish that won't outgrow your tank.

110 -280 Liters - This is a great starting size for a good marine or salt water tank.

This is a large tank...

A tank this size can stock a wide variety of fish, plants, corals or decorations. You also can't deny that large tanks look stunning.

While that is undeniably appealing, you will need to work harder to clean and maintain this sized tank.

You should also note that, when filled with water, a tank of this size is incredibly heavy and you will need to make sure that your cabinet or floor can handle the load.

This is a large tank...

A tank this size can stock a wide variety of fish, plants, corals or decorations. You also can't deny that large tanks look stunning.

While that is undeniably appealing, you will need to work harder to clean and maintain this sized tank.

You should also note that, when filled with water, a tank of this size is incredibly heavy and you will need to make sure that your cabinet or floor can handle the load.