Baking Soda vs Soda Ash When To Use Each Pool Researchcola cinder is a amazing additive for pools. It is a essential element in preserving the purity and balance of the water. Soda ash for pools is particularly formulated to aid lower acidity and balance the pH levels in one's pool. By utilizing soda ash for pools, you can assure optimal water quality for enjoying and enhanced safety for all in the water.