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Discus are beautiful tropical fish, and they make great additions to a home aquarium. Before buying some of these big and round beauties, you need to know how to properly care for Discus fish. Many people ask what tank size that they will need. I find they grow best in smaller tanks; 30 to 50 gallon tanks work great. Larger aquariums can be used for larger adult Discus.
It is also important to realize that Discus are schooling fish, which means they prefer and feel most comfortable in groups. Your Discus will not be happy in its tank unless it has several other Discus fish to school with. You can mix colors to create a school, as they only see other discus.The bigger the school, the happier they will be. I recommend in a 50 gallon tank with 8 to 18 adults to make up a good school. This larger school of Discus will also dilute the natural cichlid pecking order, therefore allowing the group of Discus fish to grow more evenly. Discus get along well with other non-aggressive fish, like angels, tetras, and catfish.Just use caution as to not put aggressive fin nippers with them.
Learn More; Discus Fish Tank Mates