Free Chlorine Vs Total Chlorine Spa. Free chlorine and total chlorine are two types of measurements we take in order to ensure. Free chlorine vs total chlorine spa.
Fac + cac = tc for example, if your free chlorine (fac) levels and total chlorine (tc) levels are the same, then there’s no combined (or used chlorine) in your water and there’s no need to add any chemicals today. The chlorine that is still active to remove contaminants is known as free. When chlorine binds up with contaminants it forms a compound called “chloramines” that are still part of the total but no longer effective.
Chlorine in water comes in two basic varieties:
Total chlorine is the total of combined and free chlorine. Most spa chemical test strips will measure total chlorine. But it’s way more effective to use a test that checks for combined and free chlorine because that will give you a clearer picture of how clean your water is. Free chlorine involves the amount of chlorine that’s able to sanitize contaminants, while combined chlorine refers to chlorine that has combined directly with the contaminants.