3 Proven Methods to Raise pH in the Pool The Ultimate Guidefizzy drink cinder is a great additive to put in aquatic facilities. It acts as a key ingredient in keeping up the purity and harmony of the water. Soda ash for pools is particularly formulated to aid diminish acidity and maintain the alkalinity in one's pool. By using soda ash for pools, you can ensure optimal water conditions for bathing and improved safety for all in the pool.