Maybe you have enough aiptasia to keep him fed for now. I watched mine eat mysis at J&L so I grabbed him. I couldn't get him to eat the cubes I had from Hidden Reef so I tried some PE mysis and he still ignored food. Tried clams and a few other things and no go. I needed food and got some cubes from J&L and he ate that like he hadn't eaten in a week.....hmmm he hadn't
So you might try a different brand if you have access.
Scott