Convict cichlids will do a good job eradicating your snail problem, but then you're going to have to worry about your other inhabitants possibly being bullied. Good Luck!
K . I will try on the comming weekend. Copper is fine with fish?. lettuc hmmm. i cant put the convicts. I dont think my jaguar or peacock bass will like it. lol Copper as in noraml copper?