Nemo takes care of him. I don't feed him. Nemo would take it away and throw it on the other side of the tank anyway.
He likes good lighting as previously mentioned --- I have a bulb socket that went bad and he is about half normal size. I think lighting is the key !
I use 1-20K and two 2-10K'S with couple of 6500's --- I use a 50/50 sometimes. He just likes good light.
Enjoy