Free Chlorine Low Ph High. If high levels of free chlorine are suspected and you need to measure above 8.0 mg/l, there are other chlorine meters that use tablet reagents that can be chosen. However, if we lower our ph to 7.2 (by following directions on a ph lowering product), we would get roughly.
Prolonged low ph can damage equipment and causes eye and skin irritation when swimming. The higher your ph the less effective chlorine becomes. For example, free chlorine (fc) levels in excess of 10 ppm will temporarily raise ph, so it is disconcerting that you report off the chart fc levels but your ph is 6.8.
So not only is total maintenance reducing the bather load in your spa, it is also ensuring your sanitizer, particularly chlorine, is effective at keeping your spa water free of dangerous bacteria, and other pathogens.
With a ph level of 6.0 your chlorine will be highly effective with 97% of your chlorine available to kill bacteria and algae. Chlorine and ph, your disinfection team, are the first defense against germs that can make swimmers sick. High acidity (low ph) in the water does protect the chlorine from being used up by the sun but stop it reacting with algae and. You should be able to tell if you are high, low, or within the ideal chlorine range.
