The bigger the tank the better. Uaru and severums work well together, but angelfish would need a larger tank to survive with uaru and sevs, like barleypop's 220.
Some say that uaru are slow growers, which when compared to other SA cichlids they are. My uaru grew on average of 1/4 to 3/4 of an inch per month. So i'd suggest not keeping them in a 75gal for any longer than 8months at the most. Although two uaru should be ok in a 75gallon. 2 uaru and 4 sevs would be fine in a 125 with proper filtration,diet and water changes.
