← Home
What every AquaChek 7-in-1 reading actually means and exactly what to do about it.
Free Chlorine 0 ppm
Critical low
Free Chlorine 0.5 ppm
Low
Free Chlorine 1 ppm
Low end of ideal
Free Chlorine 3 ppm
Top of ideal
Free Chlorine 5 ppm
High
Free Chlorine 10 ppm
Critical high
pH 6.8
pH 7.2
pH 7.8
pH 8.4