Stock slowly. maybe just satart out w/ about a dozen snails or so of different variaties. Nassarius, cerith, nerite, mexican turbo, trochus, adn margarita snails are all good choices. You said earlier that you didn't want any hermits but I enjoy watching them in my tank. Scarlet reef hermits are the best choice and for something unique you could get a couple electric blue hermits. If you decide to get a few hermits though, make sure you have plenty of empty shells or else the crabs will murder the snails for their shells.