Hello everyone. I have had my Jack Dempsey Rocky for 3 years. He is older than that because I didn't get him when he was young. He lives in a 72 gallon bow front by himself. I do weekly water changes. I tested the water and there isn't any problems with it. For the last week and a half he spits his food out and just likes to hide in his cave. Does any one have any ideas of what his problem might be?