Ultimate Guide to Using Borax Boron in Your Poolfizz ashes is a fantastic additive to put in swimming pools. It acts as a essential element in maintaining the purity and harmony of the water. Soda ash for pools is particularly formulated to help diminish acidity and balance the pH levels in one's swimming pool. By using soda ash for pools, you can assure optimal water quality for bathing and improved protection for all in your swimming pool.