How Many Corydoras in a 10 Gallon Tank?
How Many Corydoras in a 10 Gallon Tank?

Corydoras, also known as Cory catfish, are popular freshwater aquarium fish known for their peaceful nature and active behavior. They are a shoaling species, meaning they prefer to live in a group and feel more comfortable when they have their own kind around them. This makes them ideal for aquariums, as they add to the community and social dynamic of the tank.

How Many Corydoras in a 10 Gallon Tank Should You Keep?

When it comes to keeping Corydoras in a 10 gallon aquarium, it is important to consider their size and social behavior. The recommended number of Corydoras for a 10 gallon tank is 4-6 individuals. This allows each fish to have enough space to swim and reduces the risk of aggression or stress in the group.

Consider Bioload

It is also important to consider the bioload of the tank. Corydoras are active and social fish, but they do produce waste and consume oxygen, so it is important to have adequate filtration and aeration in the tank to keep the water clean and healthy.

Tank Mates

In addition to the number of Corydoras, it is important to think about the other inhabitants of the tank. A 10 gallon aquarium is small, so it is recommended to keep a minimal number of other fish species to reduce the bioload and maintain a healthy environment. It is also important to choose compatible tank mates that will not harass or harm the corydoras.

Corydoras are peaceful and social fish, and are well-suited for a community aquarium. Good tank mates for Corydoras include:

  1. Tetras: Tetras are small and peaceful fish that complement the active swimming style of corydoras.
  2. Rasboras: Rasboras are also small and peaceful, and they come in a variety of colors that add to the overall visual appeal of the tank.
  3. Guppies: Guppies are active and brightly colored, and they are a good choice for a lively community aquarium.
  4. Shrimp: Shrimp are excellent tank mates for corydoras, as they are peaceful and help keep the aquarium clean.
  5. Plecos: Plecos are large, peaceful fish that can help maintain the cleanliness of the tank by eating algae.

It is important to note that some species of fish may be too aggressive for a peaceful community tank and can harm or stress the corydoras. You may consider avoiding keeping aggressive fish such as large cichlids or larger, more active species like barbs.

By choosing compatible tank mates, you can create a thriving community aquarium for your corydoras to thrive in, and consider this as well when wondering how many Corydoras in a 10 gallon aquarium you should keep.

How Many Corydoras in a 10 Gallon Tank?
How Many Corydoras in a 10 Gallon Tank?


Aquariums for corydoras should be decorated with a mixture of hiding spots and open swimming areas. Here are a few tips to keep in mind when decorating a tank for corydoras:

  1. Substrate: A soft substrate, such as sand or fine gravel, is recommended as it is easier on the fish’s barbels and won’t damage their delicate skin.
  2. Plants: Live or artificial plants can be added to provide hiding spots and create a natural environment for the fish. Make sure to choose plants that are sturdy and won’t be easily knocked over by the fish.
  3. Hiding spots: Corydoras are shy fish and like to retreat to hiding spots when they feel threatened. Offer them plenty of hiding places, such as caves, driftwood, or pipes.
  4. Lighting: Moderate lighting is best for corydoras, as they come from murky river environments. Too much light can cause stress and make it difficult for them to find hiding spots.
  5. Water flow: Corydoras come from slow-moving waters and are not well-suited for strong currents. Provide a gentle flow in the aquarium to mimic their natural environment.

By incorporating these elements into the decoration of your aquarium, you can create a comfortable and secure environment for your corydoras. 


Corydoras are omnivorous and will feed on a variety of food options in the aquarium. Good food options for corydoras include:

  1. Pellets: Commercial fish pellets are a balanced and convenient food option for corydoras. Look for sinking pellets that are formulated for bottom-dwelling fish.
  2. Live or frozen foods: Live or frozen foods such as brine shrimp, daphnia, and bloodworms are a great way to provide variety and stimulate the natural feeding behavior of the fish.
  3. Vegetables: Vegetables such as blanched spinach, zucchini, and peas are a nutritious food option for your fish.
  4. Flake food: Flake food can be fed to your fish, but it is important to choose a high-quality brand and to supplement with other food options to provide a balanced diet.

It is important to feed your corydoras a varied diet to ensure they receive all the nutrients they need to thrive. Offer small portions of food multiple times a day, and only feed what they can consume in 2-3 minutes to avoid overfeeding and water pollution.


In conclusion, when keeping corydoras in a 10 gallon aquarium, and considering how many corydaras in a 10 gallon tank is ideal, it is important to consider their size, social behavior, and bioload. A group of 4-6 individuals is recommended to provide enough space and social stimulation for the fish, while also maintaining a healthy environment. By taking these factors into account, you can create a thriving and diverse aquarium community for your Corydoras to thrive in.