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You should add chlorine within 48 hours of filling your pool with water. In just 24 hours, bacteria and algae will begin to grow and contaminate your water. After that point, you’ll need to shock the water with high levels of chlorine, and you’ll likely need to do additional vacuuming to get the pool clean. It’s important to check your chlorine levels two to three times a week and add more chlorine as needed to maintain a healthy level.

Most of the time, though there may be some code variations on the local level, a water source like a pool requires a GFCI breaker. These breakers detect electrical leaks of 5 mA or more and trip the breaker. However, the size of the pool and motor type determine the exact GFCI needs. A GFCI outlet with a reset button may be enough for an aboveground pool with a small motor or pump. Consult a pool electrician to determine the appropriate installation and protection measures needed for your pool.

Calcium lumps in a pool are calcium deposits that form when a pool's water parameters are not in the normal range. They can float around on the surface of the pool water, making it look and feel dirty. The most common causes of calcium lumps in pools are calcium hardness above 1,000 ppm, alkalinity over 120, and a pH over 7.8. Keeping your pool’s calcium levels, alkalinity, and pH levels within the normal, safe ranges is the best way to prevent calcium lumps and other problems, including damage to the pool surface.

It’s best to avoid draining your pool onto your lawn for several reasons. Most importantly, your local municipality may not allow homeowners to drain pools in areas where it can seep into groundwater. Additionally, draining pool water on your lawn can cause erosion and damage your grass.