Home » 100 Strips/Bottle Swimming Pool Test Paper PH Chlorine Hardness Nitrite Tester 7-in-1 Reagent Meter for Fish Tank Aquarium Spa 100 Strips/Bottle Swimming Pool Test Paper PH Chlorine Hardness Nitrite Tester 7-in-1 Reagent Meter for Fish Tank Aquarium Spa 100 Strips/Bottle Swimming Pool Test Paper PH Chlorine Hardness Nitrite Tester 7-in-1 Reagent Meter for Fish Tank Aquarium Spa. Sale price : $10.76 Category : Tools