Dive Into Success: 2025 Certified Pool Operator Practice Test – Make a Splash!

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High calcium hardness can result in what condition?

Algae growth

High calcium hardness can result in algae growth. Calcium hardness refers to the amount of calcium and other minerals in pool water. When the calcium level is too high, it can cause the water to become saturated with calcium, making it difficult for chlorine to effectively sanitize the water. This can lead to algae growth as the chlorine is unable to keep up with killing bacteria and other microorganisms in the water. It is important to regularly test and balance calcium levels to prevent algae growth and maintain clean and clear water. The other options are incorrect because cloudy water is usually caused by low levels of chlorine or other chemical imbalances, excess chlorine can result in skin and eye irritation but not algae growth, and low pH levels can also lead to irritation but not algae growth specifically.

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Cloudy water

Excess chlorine

Low pH levels

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