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How often should the water in a 3,000 gallon health club spa with an average of 100 users per day be changed according to the CPO Handbook?

  1. 3 days

  2. 10 days

  3. 15 days

  4. 20 days

The correct answer is: 3 days

Based on the CPO Handbook, the water in the spa should be changed every 3 days. This is because the average number of users in a health club spa is relatively high at 100 per day. With so many people using the spa, it is important to maintain high levels of water quality, which can easily be compromised if the water is not changed frequently. Option B, C, and D may seem like viable choices, but they are not the most suitable options for maintaining a clean and safe spa environment. Waiting 10 days, 15 days or 20 days between water changes would greatly increase the risk of bacteria buildup and potential health hazards for spa users. As such, it is crucial to follow the guidelines laid out in the CPO Handbook for ensuring the safety and satisfaction of spa users.