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If your pool’s pH level is too high, chlorine won’t be as effective. Since chlorine is responsible for sanitation and keeping bacteria out of your pool, a high pH level could create a higher risk for bacterial diseases. It can also make you more susceptible to rashes and infections (like swimmer’s ear). Need to lower your pool’s pH? You can do it yourself for between $5 and $40.

If you’re wondering how to find a leak in an aboveground pool, the process is the same as it is for an in-ground pool. Note that the vinyl liner in aboveground pools is fairly thin, so sharp objects easily puncture it. Additionally, the liner can wear down after constant exposure to pool chemicals, especially when chlorine levels are higher than they should be. For these reasons, small holes in the vinyl liner often cause leaks, but you can easily detect them with the dye test.

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.

If you put too much chlorine in your pool, it can make the pH level more acidic, creating a health risk. You might experience symptoms like nausea, dizziness, vomiting, skin rashes, and irritation in the eyes, nose, throat, and lungs. To lower the chlorine level, you can turn off your chlorinator or chlorine feeder, add more water to dilute the pool, or remove the cover to let sunlight naturally reduce the chlorine.