Soda Ash Vs Baking Soda For Pools When To Use Whichfizz ash is a fantastic additive to be used in pools. It is a essential element in keeping up the cleanliness and balance of the water. Soft drink is specially formulated to aid diminish acidity and stabilize the pH levels in your swimming pool. By utilizing soda ash for pools, you can ensure perfect water quality for swimming and enhanced protection for all in the pool.