Compatible With The T3 Source Hand-Held. Start your beauty routine with a clean slate. Our shower filters reduce free chlorine, which can cause frizzy, lackluster hair. They also remove dirt, odors and other impurities from your shower water. Its pure alchemy. Mineral mixture (calcium sulfide, zinc, and copper) helps reduce free chlorine, and remove hydrogen sulfide, iron oxide, dirt, sediment, and odorsReverse filter monthly for best resultsReplace filter every 3-4 months (3k gallons) or when the filter window turns blackUse with T3 Source Hand-Held Model No. 73303 or 73312 (sold separately) This system has not been evaluated for free available chlorine reduction performance in the presence of chloramines. Free available chlorine reduction performance may be impacted by the presence of chloramines in the water supply. Please contact your local water utility to determine if chloramines are used in treating your water.