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Which type of chlorine compound is best for maintaining a consistent chlorine level in pool water over time?

  1. dichlor

  2. liquid chlorine

  3. trichlor

  4. zinc hypochlorite

The correct answer is: dichlor

Dichlor is the best choice for maintaining a consistent chlorine level in pool water over time. Liquid chlorine, while commonly used, dissipates more quickly in sunlight and heat which can result in inconsistent levels. Trichlor, while also commonly used, contains cyanuric acid which can build up over time and reduce the effectiveness of chlorine. Zinc hypochlorite is not commonly used for pool maintenance and may not be as effective as dichlor.