I have this plate, it was the first bigger piece that I every bought this passed November when I started my tank. It had one tiny spot on the edge, that was thought to be sand trauma. Over months it has slowly retracted and looks like it is in a death spiral now. It is loosing polyps, fine hair algae is taking over and every day it looks worse. Everything else is happy and my parameters are in range. What am I missing? Can this be saved?
