Need help. 100 gallon with wet dry 20 gallon sump. All my parameters are good. I have a dogface puffer and a maroon clown. Last week I got a small niger trigger. He was eating and doing great until this morning. He was swimming all strange and ended up stuck on my power head. I got him off and he went and hid in between the rocks breathing short but heavy . He did this all afternoon and then suddenly did the dance of death a few times and is now laying on the sand hardly breathing . What could be wrong? I hve no idea what to do. He has no spots or growths but ho's color did get different. Please help. I love this little guy