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Specifications Phenol Roure/Red: Indicator solution for Hydrogen Test (PH) Volume: 20mL Orthotolidine OTO: ndicator solution for Chlorine Test (CL) Volume: 20mL Features: - Water Quality Test Kit. For Chlorine Test (CL) and Hydrogen Test (PH). - With a plastic box, easy to storage. - Convenient and practical, easy to carry. Note: Please Keep out of reach of children. Important: Water samples should be taken 18''(40cm) below the surface. Chlorine Test (CL) Information: -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 (ideal) Information: 1- Rinse the test vial and fill to the mark with water sample. 2- Add 4 drops of OTO(Orthotolidine) solution. 3- Place cap on vial and shake to mix. 4- Compare your reading with the scale values. Hydrogen Test (PH) Information: -Compare your reading with the scale values. -The scale values represented by a number indicate the PH condition or alkaliinity of the water. -For comfortable water and a saving of chemical products, the reading should be between 7.2 and 7.6 (ideal) Analysis: 1- Rinse the test vial and fill to the mark with water sample. 2- Add 4 drops of red phenol solution. 3- Place cap on vial and shake to mix. 4- Compare your reading with the scale values. NOTICE 1、Because of the light and the shooting angle, the color will be slightly different from the picture. 2、Please allow 1-2cm tolerance for product size. If there is a problem with product quality, Please contact us as soon as you receive the package. We will do our best to solve problems for our customers. A negative review will not help solve the problem! Thank you very much for visiting our shop, wish you happy every day!