Water Balance ”is the process of keeping the water in a state that is neither unscaled nor corrosive. It is comfortable for swimmers and easy on pool equipment and pool surfaces.
To achieve this, the pool must be kept at the “calcium saturation level.” This means that the amount of calcium dissolved in the water is the maximum amount of water it will hold without any precipitation. We can calculate this using the "Langelier Index" found in this document.
You can think of water that is not saturated with calcium as “hunger,” which will seek something to satisfy its hunger by causing corrosion of the pool surfaces and eating away the metal components of the recirculation system. If this is “supercharged,” excess calcium is deposited as flakes on surfaces and can cause cloudy water as the calcium comes out of solution.
To determine "calcium saturation," or "water balance," we looked at the ratio of 5 different measurements of water. These factors are:
Total Alkalinity (AT) [Total Alkalinity (TA)]
Calcium Hardness (DC) [Calcium Hardness (CH)]
Water Temperature (F.)
Total Dissolved Solids (TDS) [Total Dissolved Solids (TDS)]
pH is technically the "negative logarithm of hydrogen ion (H +) concentration." In simpler terms of how an "acidic" or "basic" solution is. It is based on a scale from 0 to 14 where the lowest number indicates the most acidic solution.
To maintain a good water balance, the appropriate chlorine values should be between 3 and 5 ppm and to maintain the pH the range should be 7.2 to 7.8, in this way the water in your pool will remain in good condition and over everything will eliminate all bacteria that can affect people's health.