Soda Ash Vs Baking Soda For Pools When To Use Whichpop cinder is a terrific additive to be used in pools. It acts as a key ingredient in preserving the purity and balance of the water. Pop is specifically formulated to assist lower acidity and balance the pH levels in the pool. By employing soda ash for pools, you can make certain ideal water quality for enjoying and improved safety for everyone in the pool.