my tangs don't eat the algae of the glass, so we must scrape away. occassionally they'll pick at the stuff on the bottom, they prefer what's growing on the rock.
460 gal, 1 sfe, 1 lunare wrasse, 1 cardinal, 1 maroon clown, 1 mandarin, 1 sailfin tang, 2 domino damsels, 2 hippo tangs, 6 yellow...