What Is Free Chlorine In Pools. Free chlorine is a measurement of what is called hypochlorous acid and the hypochlorite. Free chlorine is an important factor in sanitizing your pool because it’s referring to the amount of chlorine available to fight contaminants in the water.
Free chlorine is the unused chlorine that’s still free, active, and available to sanitize your water. Pull the pool tablets from floaters; Simply put, free chlorine is the amount of chlorine available to sanitize water in your pool or hot tub.
Free chlorine is a measurement of what is called hypochlorous acid and the hypochlorite.
The word ‘free’ refers to the purity of the chlorine itself which hasn’t been combined with the contaminants. It’s very important to make sure you have enough free chlorine in. Free chlorine + combined chlorine = total chlorine. Lastly, free chlorine (fcl) refers to the amount of chlorine in your pool, which hasn’t yet mixed into the chlorinated water to sanitize any harmful bacteria or microorganisms that can grow in a pool.
