I have 6 guppies, 15 platys and a couple mollys in a 360L aquarium. i also have a MILLION snails in the tank, i went to a fish shop to get some stuff to get rid of them and the lady suggested a crown loach to eat them. now she showed me the 'small' ones and they're about 2-2.5 inches long. Has anyone had these fish in the same aquarium as guppies? will it eat my fish?