I haven't been able to get an answer to " part of my post " so I am submiting a new thread. I have read that discus are social fish. I have 1 discus & 2 siamese algae eaters in my 36 gallon tank. Will the discus be healthy & happy on his own. He did have another discus up until yesterday. Somehow it wedged itself between a rock & the glass. Today my sole discus looks great & still has his appetite. What are your thoughts ?