PoolLevels

Type in your pool test readings and PoolLevels tells you what the water is doing and the one thing to add. Most pool apps hand you a wall of numbers and a red or green face. PoolLevels computes the saturation index the way a water chemist would, says whether the water is corrosive, balanced or scaling, and gives you a single dose sized for your pool, with the arithmetic printed underneath so you can check it yourself. WHAT IT DOES Real carbonate chemistry. The saturation index from pH, total alkalinity, calcium hardness, cyanuric acid and water temperature, using the Plummer and Busenberg equilibria and Davies activity coefficients, with the cyanurate correction most calculators leave out. One thing at a time. Not a list of six chemicals. One dose, sized for your pool's actual gallons, rounded to a precision you can measure with a jug. The working shown. Every recommendation prints the…