How To Use Soda Ash Sodium Carbonate in Your Pool Pool pop ashes is a wonderful additive to be used in pools. It acts as a essential element in preserving the cleanliness and balance of the water. Soda ash for pools is specifically formulated to assist reduce acidity and maintain the pH levels in one's swimming pool. By utilizing soda ash for pools, you can assure perfect water quality for swimming and enhanced protection for all in your swimming pool.