My 6 yr old nephew has a snail problem in his tank. When he went to the LFS to buy a couple of clown loaches, they told him the loaches would eat his guppies. Is this true? I thought clown loaches were great community inhabitants. Eating your tankmates doesn't seem very neighborly. I think he has been misguided by the LFS. Regardless, he was quite upset over the prospect. So can you all clear this up for him?