Corals for sure! I had fish for quite some time and had some trouble with Ich. When I was getting rid of the Ich, I purchased some corals. My wife thinking the corals looked good and so did I. By the time I could put the fish back in the tank, I didn't care if they were there or not. I sold most of them (kept the Tangs) and purchased more coral. Now my wife says all the time that she could care less if the fish were even in there and I agree.