Thanks for your input WyldFya, maybe you should exercise some common sense and not put a 3" fish with another fish that can consume it.
Master.k clown loaches grow quite large and are a durable fish, also they have a knack for squeezing into tight spaces while hiding. Problem is if you find a couple of 6-8 inch loaches it could be quite expensive. Again with out knowing what fish you have or what size tank I can only suggest. Possibly could you house your fish in another tank for a month while the loaches do there job? The cucumber on a plate method works but you will have to do it as routine maintence and it will not eliminate the snails(of course the clowns won't completely eliminate either) all it takes is one to repopulate the tank. Also check your filter it is amazing how many snail you will find breeding in there. Sorry I don't know of any chemicals that actually work.