Have a 90 gallon tank with a 4.5 inch jack Dempsey, a 5 inch pleco, two 2.5 in convicts, one large parrot cichlid, one medium parrot cichlid, a baby green terror (1 inch), and a 3.5 inch African cichlid. I'm not sure if it a too much, I do weekly water changes, and the tank looks very good.