We bring this depth of experience to each and every pool equipment room. . Chemical Dosing Charts. Dosage . Amount of Soda Ash needed to raise pH to 7.4. Table 2-1: Bacterial Pathogens Associated with Pool and Spa use. Pathogen. General So, we need to add 2.43 lb of soda ash to this pool to raise the pH to 7.6. Table 4-4: . a more modern design, the filter rate is much higher than for the . pH is the single most important element in swimming pool water chemistry. . Chart No. 1 - Raising pH with Soda Ash (If pH is under 7.4, add this amount of soda . tremendous amount of soda ash (pH increaser) is needed to control the pH of the water . Knowing the pool volume and using chart information, the amount of . the Water Chemistry Adjustment Table for Sodium Hypochlorite (12%). total alkalinity of the water is low, a small amount of acid or soda ash will cause a large. Salt water pool maintenance is actually quite simple with the technology available in todays chlorine generators and modern testing equipment. You'll spend less . issues over time. Raise pH with an alkali calcium carbonate or soda ash. Aug 6, 2014 - Note: Instead of soda ash, you can also use sodium carbonate which is found in the pool supply area of the hardware store. Called Balance + . Jul 21, 2014 - HTH pH Plus: Raises pH levels; For use with swimming pools; 5-lb canister . Ingredients: Active Ingredient:Sodium Carbonate - 98%. Hazard Statements: Hazards to humans and domestic animals. Eye and skin irritant. Harmful if swallowed. Contains sodium carbonate. Avoid contact with eyes, .