Almost all serpentine loaches actually don't eat snails.lol Try the Yasuhikotakia sidthimunki. Small but so costly. I'd keep 5 at the very least if you can't afford more.
I think I'm already pushing the stocking limits, if not over. I have 10 Tiger Barbs (not fully grown yet, but they will be before I know it), 1 Krib, 1 BN, and the snails. Wouldn't 5 Sids be pretty overstocked?
Yeah, I think I'll just make a puffer tank and have baby snails for snacks! I've been reeeeally wanting a puffer tank anyway. This is just a good excuse. Anyone with tips for a 20g puffer tank, PM me or post here!