Does anyone have experience with this product? I find myself with what I would describe as a "moderate" snail infestation. I bought some of this "Had-A-Snail" product, and upon reading the label I noticed that it says "Care should be taken with live plants and catfish". My tank is a 10 gal planted aquarium and I have a couple otocinclus catfish. It also says "do not use with less than 25ppm hardness", and my water is extremely soft. Any thoughts? I'm a bit concerned about using the stuff now.