I kind of asked this question before, but didn't really get an answer. There are small, conical snails as my LFS that they said I could take a scoop of if I wanted em. I was watching em move around and they were on top of the substrate dragging themselves along, inch by inch. Now, I thought that MTS burrowed(this is what I need them for) and I don't really want to bring home a bunch of baby-making machines if they're not made to do the job I need them for. Are these guys MTS or something different?