I have a 75 gal. tank with about 90 fish in it. I also have 10 amanos and I don't know how many red cherries. The biggest fish that I have are 6 black neons and 6 black phantom tetras.The rest are all smaller like cpd's, cardinals, gold tetras,etc. Believe it or not my tank is doing great and my shrimp colony is growing. I know that probably most of the babies are getting eaten but I have a boat load of plants, rocks and wood in there. I can usually see at least half a dozen adults at any one time.