I have a Cobalt blue baby discus, but a few times it had some red bubble like cysts coming out its bottom. I put it in a quarantine tank for 2 days, the cysts went away, they come and go at random, the baby discus has become dark blue and hangs alone in the tank. He eats away at small amounts of food on the rocks... All the other Discus and Angels in the tank are fine. Any ideas? I have taken some pictures but not very clear... Any advice is much appreciated. Thanks guys!!!