Hi to all.
I have a blue powder tang for about 2 years. It lives in a 500 liters mixed reef aquarium (140cm x 60cm x 60cm) along with other tangs (lineatus, zebrasoma flavescens, Ctenochaetus strigosus) and other smaller species. They were all getting along fine, lineatus is the last tang that entered the reef, it was 5 cm when leucosternon was twice his size. In the meantime, Lineatus grew fast, and now they are about the same size. Of course, they started to fight. Leucosternon is still the sherriff of the tank, and it's trying very hard to maintain his position. He is chaseing lineatus all day long, trying to keep him to get food. Now, this happened before, and i hope will pass. But i have a new problem: Since the blue tang got this aggressive, he started to eat corralls. Zoanthus especially, but he's also nipping alveopora and a green brain. He eats part of them, and throws in the tank some other. He destroyed almost 2 colonyes of my zoas. He is also taking a fight with the magnet window cleaner every time i clean the glass.
Do you know what i could do to stop him eating my corrals? Or at least, why is he behaving like that?
Thanks.