I'm getting worried about my RTC- he's breathing heavy, not eating (which is very abnormal for him), and his whiskers are wilting. The water parameters are perfect and I have plenty of aeration. The tank has been running for 6 months and he's been in there for 2. No one else is showing signs of stress/illness. Water changes haven't helped. I can't see any gill curl. He's been eating Krill, Silversides, Massivore, and Hotdogs. Are the hotdogs killing him? Any suggestions?