there are two well-known test kits available to test levels of chlorine and bromine, the dpd and oto. each has a long, scientific nam, but all you really need to know are the initials. the dpd is the preferred of the two because it tests for free available chlorine -- the most powerful "killing form" of chlorine.
Welcome to Rogers Pool and Patio, located in downtown Lowell, MA. Whether you need the help of professionals to keep your swimming pool or spa crystal clear, or are interested in purchasing a new swimming pool or spa, you can count on Rogers Pools with over 65 years of experience and knowledge. We provide service to Lowell, Dracut, Tewksbury, Tyngsboro, Chelmsford, Greater Lowell, the Merrimack Valley, Southern NH, and Middlesex County.