I discovered last night my tank has ICK in it, it took my pleco and I moved my guppy to a quarantine tank. There is no fish int he tank now only a lot of plants and my drift wood and substrate. I turned off my filter, I have my heater and air stone still going tho. I added two tablets of Tetra ICK Guard because I have a 20g Long. How long should I wait until the next treatment if I need to? My water is 83/84 degrees right now.