What do TC, FC, and CC stand for in pool water chemistry?

The terms TC, FC, and CC represent essential measures in pool water chemistry, specifically related to chlorine levels. Total Chlorine (TC) refers to the sum of all chlorine forms present in the water. This includes both Free Chlorine (FC), which is the active form of chlorine effective in sanitizing, and Combined Chlorine (CC), which consists of chlorine that has reacted with contaminants and is no longer effective as a disinfectant.

Understanding these terms is crucial for pool operators to maintain proper water quality. Monitoring TC helps ensure that there is enough chlorine in the water to keep it sanitized, while examining the levels of FC and CC helps determine how effective the disinfection is and if additional sanitation measures are needed. For example, high levels of CC may indicate that the chlorine is being used up by organic material and requires intervention, such as superchlorination, to restore proper sanitation levels.

The other options do not accurately reflect the meanings of TC, FC, and CC in pool chemistry. Therefore, recognizing both the definitions and the importance of monitoring these chlorine levels is vital for effective pool maintenance and ensuring the safety of pool users.