[header] How to breed freshwater angelfish [title] Use a 20 gallon tank. [step] Before you begin breeding, you must set up the spawning tank of 20 gallons or larger. Set it up at least 3 months in advance to make sure the conditions are ideal. 
A 20 gallon tank is best because angelfish need a tall tank to accommodate their large size. [substeps] If an angelfish feels cramped, they will not feel secure and will not spawn.