Does anyone have personal experience with the most effective dosing method with PraziPro? I read the directions on the label and it said 1 TSP per every 20 gallons and that I shouldn't dose more than once every 3-5 days. If I perform a w/c, would I have to add back the does for the total volume or just the volume of the new water? How often should I be dosing and how long to continue the treatment to be sure?