My first pair of clowns stayed at the top corners of the tank and I never got them to eat. Eventually, I lost them for obvious reasons. I thought the power heads were keeping them out of the higher flow areas, but IDK. I really don't know what the issue with my first pair was. I was very cautious with the next pair I bought which ended up being an established pair from a fellow reefers tank. These guys eat, swim around the whole tank, and of course try to eat me every time I put my hand in the water. They are amazing, characteristic little fish, except when they bite me, that gets old quick.