So I noticed yesterday that my mystery cichlid from my last post has had a change. I notice his right eye appears to be buldging a bit or swollen. His left eye is fine. I also notice some discoloration on his forehead. He was solid white before. Now he has a pink almost bruise on his forehead. The water in tank is perfect and no other fish have anything wrong. Could it be a injury? Ran into driftwood? He seems to be guarding the right side to other fish. I did a waterchange last night and added salt. This tank is pellet only.no live.