Last night I believe I successfully treated my 10 gallon community tank for parasites while my apple snail was still in it. I had noticed that some of my fish were brushing against the gravel and decorations and I knew that my snail was the intermediate host for the parasite. I came to this conclusion because at one point I had to treat my tank for ick so I moved Amigo (my snail) to one of the guppy fry tanks. The guppy fry were about 4 weeks old and were perfectly healthy but two days after introducting amigo they started to develop what looked like white cotton splotches on them and began to die off. I didn't really have a choice but to treat Amigo as well since she (yes I know it should be Amiga but I thought she was a boy at first and then she layed eggs and I didn't feel like changing her name) is indeed the carrier. I put the tablet in last night before I went to bed and when I got up this morning she was out and about munching on her algae wafer. She hasn't shown an side affects at all so I'm hoping to do another dose tonight to be sure that the parasite is gone. 