When I woke this morning, I found my 1, out of 2, discus wedged between the glass & a rock. How it got there, I have no idea. I managed to free it, but it had gone through some ordeal. It did swim around a bit, but was having much trouble trying to right itself. Then.... a couple of times, I found it attached to the inflow tube of one of my box filters. It was always the same filter. Since I have 2, I shut off that 1 for awhile. Now it is hanging around the upper right side of the tank. It is breathing, but just seems to want to rest there. What are my changes that the poor thing will survive ? If it doesn't survive, will my 1 remaining discus be happy by itself in my 36 gallon tank ? Thanks, Gary. Happy Thanksgiving to my fellow Canadians.