I woke this morning to find one of my discus caught to the intake tube of one of my filters. I was surprised he was still alive, but for how long, I do not know. My local pet store said that only happens to weaker fish anyway. When I first got him loose, he fell on his side to the bottom. Then, very gradually, he began to ( wobbily ) swim a bit. He even ate a bit of food.Now he is leaning on the glass @ the bottom of the tank. I have a 30 gallon with the 2 discus & 2 siamese algae eaters.Amazingly, the other ( larger ) discus is leaving him alone. If he dies ( & I hope he doesn't ) I'll have one discus in my just newly planted tank. I really can't afford another right now. I know they are social fish. How would one do on his own, if that proves necessary ?