Per the title my 6" GT has been breathing heavy. He was dominant in a 75g tank with a couple yellow labs, perlmutts, Texas Cichlids, and Jewels all much smaller than he is, so he was dominant. I'm thinking over time that he was stressed due to the African cichlids being so busy chasing one another. I have now quarateened him to a 30g tank. He was eating or trying to eat prior to the quaranteen, but a couple days priror to moving him he would mouth the food and spit it out. Water conditions aren't an issue, I tested all parameters, feed 2 times a day, and the tank is well filtered, and do 40% water changes weekly. I just think one of two things, he has internal parasites, or he's constipated. I had fed him some peas a couple weeks back as well but don't know that it helped, so I'm leaning towards internal parasites? Any opinions, or assistance? Thanks in advance...