Help! My yellow tang is acting crazy! I recently move the rock around in my tank and added a 2nd AI prime light to my tank and a power head. As soon as it was finished my tang went crazy he is completely freaked out. He has shredded his fins going behind the rock. When the lights were off last night and this morning he was ok. I keep the tank covered cuz my lights down come on tell 1pm. They just came on and I uncovered the tank. As soon as I didn’t he went back into panic mode. I’ve had him for about 6 months super healthy. Eating great. And now I’m worried every min he’s gonna be dead. I don’t know what to do. I have the tank covered again and he’s a tad less freaked out out.