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Optimum product performance and swimmer comfort will be achieved if you test, adjust and maintain to the following: pH between 7.2-7.6, alkalinity between 80-125 ppm for plaster pools and 125-150 ppm for vinyl, fiberglass, and painted pools. Calcium Hardness between 200-250 ppm for plaster pools, and 175-225 ppm for vinyl, fiberglass and painted pools. Application Method: Do not pre-dissolve this product before adding to pool or skimmer. Do not mix this product with any other products or chemicals. Always apply this product in its dry form using a clean and dry plastic cup or scoop. Do not use this cup for any other purpose. This product should be applied through the skimmer or directly to pool as follows. Directly to Skimmer: Add product in dry form directly through the skimmer with the basket removed and the pump running. Replace the skimmer basket and keep the pump running for at least 2-4 hours. Directly to Pool: Add product in dry form directly to the pool water, with the pump running for at least 2-4 hours. If your pool has a bleachable surface, such as vinyl, colored plaster, painted or fiberglass, use skimmer application, or add directly to pool, brushing visible product until completely dissolved to avoid bleaching. Initial Start-up: Use this method if you are opening your pool in the spring, the pool has not been maintained for several weeks, or if the pool is freshly filled. Brush all pool surfaces with pump operating. Following the above application method, add 1 lb. of this product in dry form per 10,000 gallons of pool water. After two hours, test chlorine level (residual). Repeat dosage until you obtain a chlorine level of 1-3 ppm Routine Chlorination: Following the above application method, add 2 to 4 oz. of this product in dry form per 10,000 gallons of pool water every day, every other day or as often as needed to maintain a chlorine level between 1-3 ppm. The amount of product required and frequency of addition will vary with the number or swimmers, water temperature, and amount of rain. Operate the pump a minimum of 10 hours per day for best results. Shock Treatment: For best results, apply product weekly as part of your maintenance routine, or when bather load is high, water appears hazy or dull, unpleasant odors or eye irritation occurs, or after heavy rain. Following the above application method, add 1 lb. of this product in dry form per 10,000 gallons of pool water. Algae Treatment: With pump operating, brush algae from pool surfaces. Following the above application method, add 1lb. of this product in dry form per 10,000 gallons of pool water for light algae growth. Add 2 lb. of this product in dry form per 10,000 gallons of pool water for moderate to heavy algae growth. If necessary, repeat the treatment.
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