Using the Total Chlorine Analyzer Case and PH Ecopool is an economic, fast and easy way to know the level of disinfectant and pH in the pool water. Ideal for daily analysis and should be replaced annually. It is composed of 2 reagents: OTO (ortotolidine) to determine the disinfectant level, and phenol red, to determine the pH level.Ortotolidine is a transparent reagent that oxidizes, becoming yellow when contacting the disinfectant. The intensity of the yellow will depend on the amount of oxidants present in the water, while red phenol will react to pH differences from red to violet.Always do the OTO test before Phenol, as it will not work correctly if the level of disinfectant is too high, leading to wrong readings. It is also important to pass the pool water test pipes before using them.The Ecopool analyzer case is a fast and easy economic form (though not as accurate as other systems) to know the level of disinfectant and pH in the pool water. Ideal for daily analysis and should be replaced annually. It is composed of 2 reagents: OTO (orthodolidine) to determine the disinfectant level and the red phenol to determine the pH level.Way of useFill the case to the line indicated with water and pour six drops of red phenol in the red compartment and six drops of OTO in the yellow compartment. Using color tables as a reference, determine chlorine and pH levels. We recommend that testing water two to three times a week, this habit will ensure good chlorine levels and will not have to worry about a corrosive pH.