Every year it seems I need to replace my snails, from Reef cleaners.com the first year they slowly died for some unknown reason. Maybe not enough food, I don't really know. Next year I bought another pack, the nerites and Nassarius Snails quickly died off, possibly because of the 3-4 dwarf hermits that hitched hiked in with the snail pack? Still got a ton of dwarf cerith and a couple of the larger cerith. So what if I went all hermit crabs? Its just a thought, but im wondering if anyone has tried this before.