Routine Application:
With circulation pump on, add 1 tablespoon of or 1/2 an ounce of this product for every 500 gallons of water. Regular additions will be necessary to maintain 2-4 ppm of free available chlorine at all times. Actual dosages of product required to maintain the desired free chlorine residual will way with spa use and water temperature. Use a test kit frequently to determine and maintain the proper free chlorine residual.
Shock:
Add 2 tablespoons or 1 ounce of this product for every 500 gallons of water. Maintain operation of your pump and filter. Regular additions will be a least once a week. Additional treatments may be necessary when the spa is being used frequently or when spa is used by multiple people.