Add the recommended dosage of this product directly to the pool during then evening hours while the filter is running. When adding this product to your pool, broadcast the product evenly over a wide area in the deepest part of the pool. Use only a clean, dry scoop to measure this product. Do not use the scoop for any other purpose. If any granules settle to the bottom of the pool use brush to disperse.

Water Balance:

For best product performance, swimmer comfort, and crystal clear water. Maintain pH in the range of 7.2 to 7.6. Maintain Pool Alkalinity in the range of 80 to 120 ppm. Maintain calcium hardness above 200 ppm. Use a reliable test kit that measures all these ranges. Use BIOGUARD®  pool care products to make adjustments. Follow label directions for each product.