I have a lot of sediment in my tank. I'm kind of afraid to put coral in because I don't want them to get covered in sediment and die...Any suggestions? I've really tried hard not to overfeed, watching the fish eat and removing food when they look disinterested. But I still have this brown sediment under the rocks, etc. Any help would be appreciated. Thank you!

you need alot of water current, and probably dont do waterchanges like you should or filtration is poor. what kind of setup do you have ?