Honestly, after having one for a few years now, if he wants the coral, he will go eat it regardless. Id just focus on getting them to eat regularly and accept the fact that you cant keep some corals if you want one. In my case, he eats anyting with a bubble tissue ie acans, bubble corals, brains, etc so i just keep zoas and sps and im ok with that. Def make sure they are eating in the store and be aware they are quite aggressive as well. Let me know if you have any more questions.