No, no snails. I used to keep small (2-50 gal) reefs about 15 years ago, but when I got back in the hobby last year I went with a large FOWLR specifically so I could keep some fish like this that don't play well with inverts. My cleanup crew consists of a lawnmower blenny and some sand sifting gobies, all large enough to avoid being eaten by their tankmates. No inverts. And I have to say, after a recent ich outbreak due to a puffer that was stressed out by his new tankmates and wouldn't eat for a couple weeks, I have come to appreciate the ability to dose Cupramine in my DT. Works like a charm.