Water Chemistry Calculator. . Before adding salt, test your pool water for the current level of salt. Find product images, videos, Hayward logos and more. Jan 8, 2014 - You don't have to be a chemist to balance your pool and spa water. . Calculations include: Salt, pH, Total Alkalinity, Cyanuric Acid, Total . Pentair Pool Salinity Calculator - Wondering how much salt you need to get your saltwater pool to the ideal salt level? This calculator will help. Pool Calculator helps you keep calculate your pool's chemical needs. A good swimming pool app will allow you to calculate or control just about anything . A good pool app can be your best friend and we promise this list of the best function of Hayward ProLogic Pool Controllers from just about anywhere. . best solution. See more ideas about Pool equipment, Pool supply and Salt. . Hayward Pool Salt & Swim System DIY-12 Salt & Swim is the most affordable.