U.S. Pool Supply Standard 3-Way Swimming Pool & Spa Test Kit, Tests Water for pH, Chlorine and Bromine

Professional 3-method water test kit for keeping up correct Chlorine, Bromine and pH chemical levels in swimming pools and spas
Kit features a 1/2 ounce dropper bottle of OTO (Orthotolidine) Chlorine Test Solution and a 1/2 ounce dropper bottle of Phenol Red pH Test Solution
Includes clear view water trying out block with accurate measuring scale and integrated color markings for the chemical levels
Comes with a user guide and it all shops in a polyethylene case
Simple to make use of, just fill every test tube with pool water, add 5 drops of the correct solution into every test tube, put the test tube caps on, shake the trying out block then check the Chloride, Bromine and pH readings