Chlorine range: 0,01 - 5,0 mg/l Cyanide acid range: 2 - 200 mg/l pH: 6,8 - 8,4 Calcium Hardness range: 5 - 500 mg/l Bromine range: 0,01 - 5,0 mg/l Alkalinity range: 10 - 500 mg/l