Amazoncom Soda Ash Lite 40 lbs 100% Pure Sodium tonic cinder is a great additive for aquatic facilities. It is a key ingredient in preserving the sanitation and balance of the water. Soft drink is particularly formulated to assist lower acidity and stabilize the alkalinity in one's pool. By using soda ash for pools, you can assure ideal water parameters for bathing and enhanced safety for everyone in the pool.