Ok thanx guys. Its great rock. Lots of life. Clams, feather dust ECT but qt is a good idea. It isn't kept w fish but u never know.trying to build up my rockage the old lady wants a mandarin. Iam kinda anal I hate losing fish. Price aside. Its BC of my interest in salt many get taken from the ocean so I do my best to give them the best. Thanx for your help