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How to breed convict cichlids
Select the breeding aquarium.
Buy a semi-large fish tank, at least 20 gallons (75.7 l). A 30-gallon tank is ideal for one pair of breeding convicts.
If you have the space, a 40-gallon breeder tank is ideal, especially if you're planning to breed more than one pair of convict cichlids. Make sure that you don't exceed more than one breeding pair per 20 gallons (75.7 l) of water.