sargassum's rock... so do blue jaws... you can get small blue jaws for like 30 bucks if you shop around... sargassum's are balla... like 80 bucks for a small one, but they are worth it...
my friend had a huge clown trigger in his tank for months, and he did fine until he got ick and died... i have never heard of a predatory trigger dieing of ick... strange... but it totally depends on the fish itself... he tried getting another small trigger, and it ate a colony of micro mussas... then a blue hippo tang ate another colony of micro's... LOL...