Just got my new Convict tang in today. Had all my water levels tested yesterday and all are perfect. Been running tank for years now. I acclimated him for 3 hours using the drip type. I put him into my tank with the lights out for about 4 hours until it was daytime for them. I found him laying on his side in the middle of the sandbed and breathing really hard. No signs of disease. Have never had this problem with any of my other fish. Seems like yellow tail damsel, which is smaller than him, seems to show aggression but swiping his tail on the tangs side. What could be up with my tang?