Ok, suppose you did have the correct water parameters - with a baby severum that will grow out to 8"+ and a parrot one single discus would be a bad idea. You have to keep in mind that fish DO grow, and when they get bigger they require more tank space and they are alot more agressive if they've been in the tank and have already established territories. It IS possible to have a lone discus, but i wouldn't reccomend it - if you do discus - do them the right way - otherwise it's going to look like a black football the entire time you have it. |