Pool Care Basics: Maintaining Balance
Over the course of the pool season, many factors will change the balance of your pool water. When water is added to the pool, whether by rain or your garden hose, the pool water is diluted and the strength of the chemicals is lowered. Remember, the key to effective pool care is to maintain a balance: a change in one area will affect the overall balance of the chemicals. The main water balance factor that will need to be adjusted is pH. Frequent water testing is important to monitor pH and other water balance factors.
More on Maintaining Balance