If you wish to breed true tilapia in your aquarium, you need to obtain a breeding couple. One of the easiest methods is to purchase a group of young tilapia and let them grow up together. This way, they can form their own pairs as they reach sexual maturity. Getting tilapia into breeding conditions is not very tricky. Keep the fish in a suitable environment, and feed them a nutritious diet.
A breeder colony consists of two males and four females. The average length is about four inches.