Hi everyone, I just returned from my sisters house, where she has a 30? gal tank, with just a few fish (Gouramis I think) anyway she has recently developed a massive snail problem, I helped her extract at least 25 of the little jerks. We don't know where they came from (She never had snails before) all I can guess is they came in the bag from the store with her most recent fish purchase, she says she saw nothing other than the fish in the bag. Anyway she doesn't have internet, and the guy at the pet store seems clueless, so she needs help (via me) is there a natural predator for snails that can live in a 29/30? gallon tank? or are there chemical treatments available? She'd really rather not tear down the whole tank to get rid of them, but will if she needs to. Thanks in advance for the help!!