Charlie knocked the holes in his head playing ball with my wife. Never been sick a day in his life. He is 3 years old and is 15 inches long and 3 1/4 inches wide. Trust me those are scars from playing not from HITH. HE has A 90 gal. tank to himself with weekly 40% water changes. Very well kept and cared for. He has 990 gals per hour of filtration on his tank. My wife babies him and would die if he got sick. He plays ball with a ping pong ball. She had to take it he was beating himself up to bad. He was hitting the glass lids and the driftwood. I do thank you for your concern.