Any small fish that eat macro algae?

[CAT]

I plan on setting up a 20 gal prop tank when I move. I'll be stocking it with some corals out of my fuge, my problem is that the rock the corals are one have caulerpa rooted to them. I'll try some scrubbing but I'm pretty sure the macro will start to grow back.

Any suggestions on a small fish that will keep the macro under control and do well in a 20?

Thanks,
Cherry

[Doug1]

Hmmmmmm maybe a lawnmower blenny but IME they dont have huge appetites, tho they might pick at new sprouting growth. Unfortunatly there is no small tough SW equivalent of plecostomus

[CAT]

Thanks for the suggestion Doug. I couldn't really think of anything that's under tang-size either

Never had a lawnmower, do they eat reg. food as well?