hope he starts eatting aiptasia

[JaiWiz]

I got a matted filefish about 4 days ago, just wondering if there are any tricks of the trade to get him to take care of the aiptasia or is just a waiting game. when i feed my tank freeze dried brine shrimp or purple nori he'll eat but he wont touch pellets. should i completely stop feeding my tank till he starts mowing down on my massive aiptasia garden??