How Many Fish In A 10 Gallon Tank

What Species Should Go In Your Fish Tank

Balance is vital to fish tanks. It is vital, just like it is in so many other aspects of life. Overcrowding your tank can hurt your fish’s health and happiness. Fortunately, determining how many fish your tank can handle is rather simple, and just remember that baby fish will get bigger! We’ve answered a few of the most frequent queries people have regarding how many fish in a 10-gallon tank make it even easier for you.

how many fish in a 10 gallon tank

How many fish are in a 10-gallon tank?

At first, strive for one little fish per gallon of water, introducing them in small groups every few weeks. The aquarium should mature to the point where you can maintain two neon-tetra-sized fish per gallon once your skills are perfected. If the species allows, you may keep up to ten tiny fish in a 10-gallon tank. However, if you contemplate some of the larger species, you’ll probably have to restrict yourself to two or three species at most.

Loads of Waste

As fish consume food, they excrete waste, which in turn contributes to the aquarium’s nitrogen cycle, which is subsequently broken down by helpful bacteria and living plants. When waste levels rise, water quality suffers, leading to sickness or death in fish. As a result, it is critical not to overcrowd an aquarium with fish such that the waste they produce causes them to become ill. There are numerous options for reducing waste:


Our fish tanks contain naturally occurring beneficial bacteria that consume hazardous waste chemicals like ammonia and convert them to less harmful substances like nitrate. Beneficial bacteria prefer to flourish in aquarium filters, so make sure you have enough filtration for the size of your aquarium.

Plants for Aquariums

Another way to remove hazardous nitrogen waste from the water is to employ live aquarium plants, which eat the nitrogen compounds as food and use the nutrients to develop additional leaves. The aquarium can hold more fish if you have additional plants. Plants that develop quickly, such as stem plants and floating plants, eliminate nitrogenous waste more quickly than plants that grow slowly.

Maintenance of the Tank

Use an aquarium water test kit to ensure that nitrogen waste levels are at or below 0 ppm ammonia, 0 ppm nitrite, and less than 40 ppm nitrate to keep your fish happy and healthy. If the beneficial bacteria and living plants can’t digest the waste compounds quickly enough, your tank may become cloudy. In that case, you’ll need to remove part of the old aquarium water and replace it with fresh, dechlorinated water.

Food for Fish

Certain fish meals are better than others. Low-quality meals tend to disintegrate easily and have a lot of indigestible filler elements, resulting in increased waste. High-quality meals, such as Xtreme Nano pellets and frozen foods, are the polar opposite and produce less waste, which is why they are recommended as “clean” foods.

Even if you only give high-quality fish meals, keep in mind that the more food you feed the aquarium (whether you have a large number of little fish or a single large fish), the more faces it produces. Furthermore, certain fish are “messy” because they leave leftover pieces in the water, which decay if not cleaned.

Swimming Area

Beginners were typically told that they could keep 1 inch of fish for every gallon of water in the past. This rule of thumb primarily applies to tiny community fish ranging in size from 1-3 inches (2-7 cm). Ten 1-inch tetras, for example, do not have the same body capacity as one 10-inch Oscar. If you intend to raise larger fish, the amount of available swimming space becomes critical.

Level of Aggression

Last but not least, consider your fish’s level of hostility. The goal with African cichlids is to add more fish while reducing the swimming area so that no one fish can develop and defend its territory. To block up the line of sight and allow lesser fish to quickly flee and hide from strong fish, you may need to add a lot of decorations and plants.

A betta fish in a communal tank is another example. Bettas like to hang out at the top of the tank, and if other Fish swim near the surface in their domain, they may get violent.

Fish that can live in a 10 gallon tank

Let’s take a look at some of the greatest fish for a 10-gallon tank that you can buy.

  • Guppy 
  • Platy Fish 
  • Balloon Molly Fish
  • Sparkling Gourami
  • Corydoras Pygmies
  • Betta fish
  • Neon Tetra
  • Rasboras Harlequin

In a 10-gallon tank, how many GloFish tetras can I keep?

Because GloFish Tetras only reach a maximum adult size of 2.5 inches, they will remain little throughout their lives. That means a 10-gallon tank can comfortably accommodate up to 5 GloFish Tetras.

How many tetras can I keep in a 10-gallon tank with a betta?

With proper filtration and weekly partial water changes, you may comfortably keep 6–8 neon in a 10 gallon [38 litter] with one male betta. As you will be keeping your neon tetras with a male betta, in particular, there are a few additional things to consider.

Is it possible for cherry shrimp to coexist with a betta?

Finally, having bettas and cherry shrimps in the same tank may frequently be successful, and they make good tank mates. That being said, if you have an aggressive betta, you should avoid adding any tank mates to their tank.


So, how many fish are in a 10-gallon tank? Do your homework and make an educated selection because various factors determine the ideal fish density. Keep in mind that a little breathing room may go a long way toward ensuring ideal water quality and stress-free fish! A far better approach is to always err on the side of caution rather than pushing for the maximum capacity.