Check the listing for details. US 1-2 Pack Essential Ph & Chlorine Levels Swimming Pool Spa Water Test Kit. Condition: New. Listed at 9.49 USD. USA Seller, Ship Fast! Information1: Compare your reading with the scale values.The scale values represented by a number indicate the quantity of chlorine combined with water.For effective treatment, the reading should be between 1.0 and 1.5 (best) Information2:Rinse the test vial and fill to the mark with water sample.Add 4 drops of OTO(Orthotolidine) solution.Place cap on vial and shake to mix.Compare your reading with the scale values.Hydrogen Test (PH) Information3:Compare your reading with the scale values.The scale values represented by a number indicate the PH condition or alkalinity of the water.For comfortable water and a saving of chemical products, the reading should be between 7.2 and 7.6 (best) Analysis:Rinse the test vial and fill to the mark with water sample.Add 4 drops of red phenol solution.Place cap on vial and shake to mix.Compare your reading with the scale values.USA Seller, Ship Fast! Information1: Compare your reading with the scale values.The scale values represented by a number indicate the quantity of chlorine combined with water.For effective treatment, the reading should be between 1.0 and 1.5 (best) Information2:Rinse the test vial and fill to the mark with water sample.Add 4 drops of OTO(Orthotolidine) solution.Place cap on vial and shake to mix.Compare your reading with the scale values.Hydrogen Test (PH) Information3:Compare your reading with the scale values.The scale values represented by a number indicate the PH condition or alkalinity of the water.For comfortable water and a saving of chemical products, the reading should be between 7.2 and 7.6 (best) Analysis:Rinse the test vial and fill to the mark with water sample.Add 4 drops of red phenol solution.Place cap on vial and shake to mix.Compare your reading with the scale values.