3 Things to Know About Preventing Pool Scale

Keep pH between 7.2 and 7.6 Calcium scale forms when pH rises above 8.0. Test weekly and adjust to stay in range.

Maintain calcium hardness between 200 and 400 ppm Hard water above 400 ppm increases scaling risk, especially in regions with naturally hard fill water.

Use total alkalinity of 80–120 ppm as a buffer Proper alkalinity helps stabilize pH and prevents sudden spikes that cause scale.