When using products in conjunction with this product, follow the instructions on those products. NEVER mix different products together in the same bottle or pail. Clean the pool filter as necessary, following the manufacturer's instructions for backwashing or using a filter cleaning solution. Prepare your pool for the closing season by adjusting pH of pool water to the ideal range of 7.4 - 7.6. Winterizing will prevent growth of algae during the off-season winter months when the pool is not in use. When pool is balanced and free of visible algae, add 48 to 64 fluid ounces of algaecide per 10,000 gallons of water. If pool has some visible algae growth, add 96 - 128 fluid ounces of this product per 10,000 gallons of water. Add this product with the pump running before draining to desired winter levels and placing winter cover. It is necessary that a uniform distribution of algaecide throughout the pool made for maximum effectiveness. If pool is not covered, it may be necessary to repeat the treatment additional times during the season.