It is essential to change the water in your pool regularly. How often this needs to be done depends on several factors, such as the size of your pool, how many people use it, and what contaminants are present. \
Generally speaking, you should plan to replace between 10-25% of the water each month for a residential pool. You can also test the pH and chlorine levels weekly or biweekly, which can help gauge when a total replacement may be necessary. Additionally, using an algaecide monthly or after heavy rainstorms can help keep algae growth under control. \