Hey Josh....I like a variety of snails - I think it does a better job than just one particular type. Tiger Trochus, Trochus, Cerith, Nerite, Astrea, maybe a fighting conch, and nassarius** (**if you have a DSB) make a good mixture, IMO. Also, in regards to the snails being dead...there will be other critters, too, that will help in the clean up process, such as bristleworms. Have you watched your live rock at night yet? Amazing how much life is there.