nudibranch-safe carnivore/scavengers?

[Mike N]

I have a lettuce nudibranch in my small frag tank that absolutely bulldozes hair algae. Only other occupants are a pair of storm clowns and 4 snails.
I'm trying to find an invert that will scavenge for uneaten food but will not harm the nudibranch. Any suggestions?

 

[Spare time]

Nassarius, hertmits, shrimp, etc won't bother the nudibranch. Peppermind shrimp are pretty cheap and effective since they tend to hide in places where leftover food collects.