How to Calculate Raising Alkalinity with Soda Ash | eHow
Add soda ash to the pool water by using a method called broadcasting. Fill a container with soda ash and walk around the circumference of the pool, distributing the soda ash into the middle of the pool. Add 1.6 ounces of soda ash for every 1,000 gallons of water in the pool and for every 10 parts per million of increase in the total alkalinity ...