Ok, So I have a pair of black clown fish, this behavior may be 100% normal but since I am relatively new to them I do not know. My large clown from time to time hovers very close to the rock for sometimes a few hours (maybe hunting for things in the rock). Overall appears healthy, my nitrates are a bit high this afternoon but are normally @ 0. I believe they are up due to the fact I just killed off a bunch of algae and cyano etc... All other parameters good. Any insight is welcome.