hi I run a 450 mainly sps tank with some LPS on the botton. Two days ago I purchased a small about 4 inches plate coral that I placed in the bottom. Now I have noticed it sweepers out at night all other corals are around 6 to 10 inches away from him , why? I have kept a plate in an old tank that grew to the size of my hand but never seen any sweepers. This tank in 4 times bigger then my last tank with refugium and all the latest things on it.
I know corals extend these out with stressed out what to do he is down current so the sweepers are not touching anything.