90 Gallon Fish Tank – What You Should know

90 gallon fish tank

Last updated on July 14th, 2022 at 09:17 pm

Fish like to live in tanks that have a lot of space. A 90 gallon fish tank is the perfect size for many fish because it’s big enough to provide plenty of room, while not being so large as to be overwhelming or difficult to maintain.

A good rule is that a fish tank should be at least as long as the largest individual in it. The 90 gallon fish tank size is perfect for most situations, but there are also other sizes available if need be.

The most important consideration when choosing a fish tank is the size. A 90 gallon fish tank will provide plenty of space for many different types of fish, and there are also smaller sizes available if needed.

90 gallon fish tank dimensions

90 gallon fish tank

The 90 gallon Aquarium is the largest in our series of tanks. It’s recommended for larger fish, like cichlids or goldfish. The width is 20 inches and 19 inches deep which makes it perfect to house a single large tank inhabitant with plenty of space left over!

This aquarium can be used as a community fish tank with a few small fish, or as a single-fish species aquarium.

How big is a 90 gallon fish tank?

A 90 gallon fish tank in the United States is about 108 liters. A 120 liter tank would be just a little bit larger than that at 118 gallons and so on to 220 gallons, which is around 262 US liquid quarts or 3420 cubic inches as measurements for volume.

As you might expect, bigger tanks are going to require more water and more care than smaller ones.

For the most part, you won’t have to worry about how much water your tank holds as long as you’re able to replace it with fresh tap water every week or so- but do keep in mind that heavily planted tanks will require a bit more than other types of fish tanks for upkeep.

35 Gallon Fish Tank - Everything You Need To Know

90 gallon fish tank weight

90 gallon fish tank

The weight of a 90 gallon fish tank will depend on the thickness and quality. The cost also depends on these factors as well as where you purchase it from.

Typically, the fish tank weighs between 400 and 500 pounds. This weight is based on the thickness of the glass, which affects how heavy it will be.

A 90 gallon fish tank can be either round or rectangular, depending on your preference. They are usually made out of glass but if you’re looking for something that is more durable, you can buy one made out of metal or acrylic.

How many fish can you have in a 90 gallon fish tank?

You can have up to 12 fish in a 90 gallon fish tank. You should not add more than that because the water will become dirty and unusable for your fish.

How much does a 90 gallon fish tank cost?

A 90 gallon fish tank can be purchased from a pet store for approximately $300.

90 gallon fish tank setup

This is a guide on how to set up your 90 gallon fish tank. It will be broken up into three sections: the aquarium, equipment, and livestock.

– The Aquarium

  • The first thing you should do when setting up an aquarium that has never been used before or replacing old filter media is rinsed it thoroughly with water from your home faucet.
  • Next, you need to rinse all of the filter media and clean any mechanical filters that may be included in the kit with a hose or spray nozzle at your local pet store.

– The Equipment

  • You will need an aquarium stand or table to place it on; if there is no such thing available, you may need to purchase one separately.
  • You will also need a filter and an aquarium heater, as well as any other necessary equipment for your tank setups such as gravel or plants.
  • The last thing you should do before adding anything else is rinsing all of the materials thoroughly with water from your home faucet until it runs clear.
All About A Betta Sorority Tank

– The Livestock

  • You will need to plan what kind of fish and other animals you want in your tank before anything else. For instance, if you are going for an aquarium setup that has a large variety or mostly invertebrates, this is when it would be best to purchase them. You could also buy some live plants while you are at the pet store.
  • Next, it is best to purchase your fish and other animals after setting up a quarantine tank for them in case they have any diseases or parasites when you buy them from their local pet store.
  • After that, rinse all of the live plants again with water from your home faucet, and then place them in the tank.
  • Rinse all of your live rock for at least three minutes before placing it inside as well, as this will remove any harmful bacteria from the rocks or potential pests that may have been hiding on them.

– The Final Steps

Now you should fill up your aquarium with water to where it is at the desired height.

You will also need to fill your filter with water and any necessary chemicals that may be included in your kit, such as a dechlorinator or aquarium treatments for algae prevention.

Lastly, you should plug everything up and test it out before adding anything else into the tank. You do not want to add anything else into the aquarium before it is running properly.

Can I put a 90 gallon fish tank upstairs?

90 gallon fish tank

You can but it’s always a good idea to have the aquarium on an even surface. If you’re going to purchase an aquarium, we recommend getting one with glass sides as this would be easier for cleaning and finding lost fish. Since 90 gallon fish tank is usually quite deep (21-24 inches), make sure that there is sufficient space available to accommodate it.

The Top 15 Largest Aquariums in the US You Should Visit


The biggest takeaways are:

  • The tank is a perfect size for the right balance of fish, plants, and decor. It’s large enough to have plenty of space without being overwhelming or taking up too much room in your home. The glass walls give it an airier feel than most tanks with plastic sides.
  • You can’t put a lid on the tank. This is probably more of an issue for me than most people, but it’s still worth noting that you can’t cover your fish up from above.
  • The glass walls are very thin and easy to scratch or crack if you’re not careful when cleaning them.