Currently, we have 19 tanks running. My 13 year old has a 10 and a 37 gallon for livebearers, and an 8g with a crayfish. Hubby has a 75g with African cichlids. The remainder are mine - 55g with central and South American cichlids, 55g Amazonian tank, 55g angelfish "dating" tank, several angelfish breeding and grow-out tanks ranging from 5 to 29g, and finally, a 55g with my first discus. I have 7 babies I'm trying my hand at growing out. I got them ranging in size from about 1 to 2", and except for my runt that just isn't growing, they are currently 3.5 to 4". I'm gonna need to either sell off a couple soon or get a bigger tank! I would love to take a run at breeding discus down the road.