How many turtles in a 20-gallon tank?

As you may know that 20-gallon tank’s dimensions are 24″ x 12″ x 16″ (L x W x H), but it is not easy to decide how many turtles can we keep in it. The answer depends upon the age and breed of the turtle and in this article, we will discuss these deciding factors in detail.

can turtles share a tank?

Yes, as long as you provide enough space for each turtle.

The recommended tank size for a single turtle is 10 gallons of water. So if you have two turtles, you would need a tank that is at least 20 gallons. You should also make sure to provide plenty of hiding spots and toys so each turtle has its own space.

The best habitat for turtles is in the wild. However, if you are looking for good habitat for turtles in captivity, there are a few things to consider. First, the enclosure should be large enough for the turtle to move around freely and comfortably. Second, the enclosure should provide plenty of places for the turtle to hide, as they like to do this in the wild. Third, the enclosure should have both land and water areas, as turtles need both to thrive. Finally, regular feeding and cleaning of the enclosure are essential to keeping your turtle healthy and happy.

Red-eared slider turtle

A red-eared turtle’s size varies from 5 to 13 inches. So if your turtle size is more than 10 inches you cannot keep two red-eared turtles in a 20-gallon tank. However, if you have planned to buy baby red-eyed turtles then you can even keep 3 to 4 red-eared turtles in a single 20-gallon tank as the baby turtles are as small as 1 inch only.

There are several factors to consider when determining how many red-eared turtles can be safely kept in a 20-gallon tank. The size of the turtles, the amount of filtration and aeration in the tank, and the overall health of the turtles all play a role in how many can be safely kept in one space. As a general rule of thumb, it is generally safe to keep one medium-sized turtle per 10 gallons of tank space. However, if you have multiple turtles or larger turtles, you may need to increase the size of your tank or decrease the number of turtles accordingly. It is also important to make sure that your tank has adequate filtration and aeration, as this will help to keep the water

Western painted turtles

Western painted turtles are smaller in size compared to red-eared turtles and they can reach up to 6 inches in length. So if you are planning to buy western-painted turtles, you can easily keep up to 3 turtles in a 20-gallon tank. However, if you are planning to buy baby western-painted turtles, then you can confidently place up to 6 turtles in a single 20-gallon tank.

Eastern box turtles

Eastern box turtles are also usually smaller in size (4 to 8 inches), so you can confidently place up to 2 turtles in a single 20-gallon tank. However, if you are planning to buy baby eastern box turtles, you can buy up to 5 to 6 turtles and keep them together in a tank. However, as they grow in size you have to separate them.

Wood turtles

This species of turtle can grow as large as 9 inches, so we advise that you should not keep more than two wood turtles in a single 20-gallon tank. However again the babies are an exception as they are quite small in size.

Musk turtles

Musk turtles are included in one of the shortest species of turtles so you can easily keep up to 3 musk turtles in a 20-gallon tank.


There is no one answer that fits all tanks or styles of turtles. It depends on many factors, some including tank size, turtle size, number of turtles in the tank, and age of the turtles in the tank.

It depends on the type of turtle that you are talking about. For example, small turtles can be kept in relatively small tanks since they need to live in water and don’t require much mobility. Large turtles do not enjoy having their movements limited, so it is recommended to set aside a larger space for them–for extra exercise.
You will need 17 square meters per large turtle (e.g., an African side neck or Asian river turtle). The estimate includes extra space that will allow each animal 8 square meters for both living quarters and exercise areas when necessary.

We recommend purchasing smaller turtles if given the chance as they usually need less maintenance than larger turtles since they do not take up much water and food resources–making them generally cost-effective creations for any home.

Adding flowering plants to the space around the pond would greatly help oxygen levels increase throughout this large tank that houses these gorgeous turtles. Weekly water changes are necessary for this type of setup, but fortunately, they’re small enough that adults can handle them at home without any worries! Turtles like clean surroundings like their owners do whenever they spruce up their abodes – so weekly water changes are important. You can also add a turtle water conditioner to the tank to remove all the harmful chemicals and bacteria.

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