I need some help about flatworms, did a 20% water change yesterday and low and behold the little clear white devils showed up. So I went to my fish store and they sold me Flatworm eXit made by Salefert. Treated my tank did the 25% water change. Got up this morning and there they are all over the glass. I'm doing another treatment as I'm doing this. Is there anything else I can do other then setting up a hospital tank and purging this one. Help