Ok thanks! I'll hopefully get out to dollarama tomorrow. They're taking soooo long to eat bloodworms before I put them back in their nice clean planaria free tank.
As for nerites, they eat algae that grows on the glass and some apparantly eat algae wafers but Milly doesn't. I don't even bother trying anymore- there's plenty of slimy nasty algae on the filter.
Pest snails, you can starve them out but it's hard, bait them with some sort of veggie, assassin snails (but not all "work" in tanks with another food source) , bettas and puffer fish eat them, ... Um... yea. There are snail remedies which are chemically based so I don't know about those.