I feed the fish twice a day at three hours and I have heard the gts seem to be slow growers but I've never hear of not growing lol. He does have orange on both his top and caudal fin I was trying to compare pics on google but when I google blue acara and green terror they come up with both because people mix them up so much. I'm gonna go to one of my lfs and get a larger one and put it in my 125 and put the smaller one in my 55 alone and see how it goes hopefully I can get some growth from one of them or do u think I put them together in the 55 and still maybe see some growth from one. M1ste2tea all my fish are still growing so I feed them about 2-3 times a day. And sometimes I feed them hikari Gold, cichlid stick, cichlid granules, cichlid flakes, and brine shrimp.