Minimum for discus should be around 6 individuals. This spreads aggression out. IF your buying juvis, don't plant the 55, if you want them to grow out properly and good, you need to do a bare bottom set up till they reach about 5inches. If you don't you run a real risk if stunting, footballed body shape, and inadaquate feeding. A bare bottom tank with discus in it looks pretty darn nice, I have one that I'm running two emperor 180's on and it works fine. With young discus you really need to be prepared to do AT LEAST a 50% water change every other day, if not every day. Also do not get your fish from a pet store, their fish are most likely infested with parasites, and have not gotten the care they need. Consider running two smaller heaters in the tank, that way if one malfunctions its not gonna cook $200 worth of fish. If you want some more help on this though, get hold of me though PM I'd be more than happy to help ya out, and I have a lot of connections in the Discus community. Just too many people on here think they know more about discus than they do, if I don't know the anwser to your questions I can give you phone numbers to people that do. So get hold of me bud.
