How Many Seahorses Can I Put In A 30-Gallons Tank?

Seahorses Can I Put In A 30-Gallons Tank

Keeping Seahorses could be a huge task, one task is getting them and another task is housing them and taking care of them.

Getting them could be easy, but housing and taking care of them could be complicated. Seahorses are not like other animals that you can keep in any kind of tank or aquarium and they will be just fine.

Their tanks should have more height than width, so how many of them will a 30-gallon tank be able to contain? Don’t worry, you will find out even more in this article.

How many Seahorses can I put in a 30-gallon tank? A 30-gallon tank is the right tank size for a pair of seahorses.

There are many species of Seahorses, some are big while some are small or average, so it really depends on the specie, age, or size of the Seahorses you want to keep in a 30-gallon tank.

An adult big specie of Seahorse could grow more than 15 inches in height, and also with some reasonable size in width.

Such species should not occupy less than a 30-gallon tank per pair for them, to be very comfortable, as they are very fragile and do not like being under stress.

Smaller Seahorses like the Pygmy or dwarf Seahorses could be kept up to 6-8 in a 30-gallon tank.

Although Seahorses don’t like a crowdy place, and so shouldn’t be kept more than 8, unless the tank is very big, so that they will have enough space and room to move about and also to reduce the level of water dirtiness and also bacteria breeding.

How Many Seahorses Can You Have In A Tank?

Seahorses don’t require a very large tank because they don’t like being jam-packed in just one tank because of their fragile nature so, keeping just a few of them in a tank is okay in order to curb their mortality rate.

How many Seahorses can you have in a tank? Seahorses shouldn’t be kept many in a tank because they could easily become sick and die. The recommended maximum number of Seahorses to be kept together is 8.

Seahorses are kind of lone animals. This means that they could be kept alone and they will still be fine, so, there is no need to jam-pack them in just one tank.

They are so sensitive that they will be affected by any rise in ammonia etc, so, keeping many of them in just one tank is a huge risk, so 1-8 are the recommended numbers to keep, depending on the type of tank you have.

Related: Which aquatic animals can live in a 1-gallon Aquarium?

Related: Can a Seahorse live in a 20 gallons tank?

Related: Can different types of Seahorses live together?


A 30-gallon tank is great to keep your pair of Seahorses. You can also keep a single Seahorse of any type in it too without having any issues.