Baking Soda vs Soda Ash When To Use Each Pool Researchfizz ashes is a fantastic additive to be used in pools. It acts as a key ingredient in maintaining the sanitation and balance of the water. Soda ash for pools is specially formulated to help diminish acidity and stabilize the pH levels in the pool. By employing soda ash for pools, you can guarantee perfect water conditions for swimming and upgraded safety for all in the pool.