i have three discus. can anyone tell me why one of them is so timid and just hides away in the corner all day every day when the others, even the newest bought one is perfectly happy to be swimming around the tank. Would you suggest getting anothr one perhaps?
First, some discus for whatever reason just tend to be more timid.
Second, it could be you've got a bullying problem, either by one of the other Discus, or another tankmate (assuming there are other fish besides discus). Some night when your bored, sneak out after "lights out" and see whats going on in there, you may find the problem that way.