Thanks Roka, those are the ones. The owner of one of the LFS
They've done an awesome job of cleaning/mixing the sand up.
Since I'm a newb here, should I keep them or try to trade them in for something else that'll keep the sand mixed? I've seen cerith snails are good for that. I'm afraid they'll eventually starve or eat something I don't want them to.
All the snails i have now, don't bother with the sand at all, unless there's something yummy on top. The fiddlers only sift the top couple of grains. I have 1 1/2"-2" sand.