How much flubenizonel be used to kill snails and how often should I dose the tank? I've been told that 1 week should do it as far as duration is concerned. Is there any brand named fish medication that this chemical is in or will I have to get it from a pharmacy? Sorry to rehash this topic again, I lost my email that was sent with the "how to's" of flubenizonel. Thanks Walta <")}}})><