I noticed the end of last summer my pond here in decatur had alot of those snails in it...I've noticed quite a bit of em this year already and the perch I caught over the weekend had plenty of those parasites on them..Will getting some shellcrackers get rid of the snails for good or just keep them in check? Next to unsightlyness, I dont think I could eat the fish with those darn things in them.. HOw can I get rid of it??? The pond is about 3/4 acre stocked with black crappie/channelcats/perch... I have no idea what kind of perch they are because were transplanted... Look like any other perch you find in a tank in texas!