Is DPD (Pink Chlorine Test) the best for chlorine?
No! Our extensive field experience has shown that the OTO (Yellow Test) is a better choice. Let the test stand for 5 minutes after adding the reagent. Don’t worry about free or combined chlorine. United makes depending on DPD (Pink test) obsolete. We also found that DPD is less reliable. Is there anything different when using Yellow Treat? Yes! Your pool will go through a clean-up period that will last from one day to 3-4 weeks. During that clean-up period you may experience a low or no chlorine reading. Don’t panic! Just chlorinate continuously. Don’t shock! A chlorinator or feeder makes life easy and we recommend them. If you lose your chlorine residual during heavy rain, bather load, or high temperature, just increase your feed rate until the residual comes back. Do I still need chlorine? Yes! Yellow Treat is activated with chlorine. After the initial treatment, chlorinate continuously which is much better than shocking. How can my pool look so good without a chlorine residual? Just
