AquaCare by HotelSpa® Advanced High Intensity Super Compact Universal Shower Filter with Replaceable Enriched KDF Shower Filter Cartridge This Universal Shower Filter comes with easy to replace Enriched KDF Shower Filter Cartridge. For best performance, disposable cartridge should be changed every 6 to 9 months for an average household of four, or after 10,000 gallons of water usage. Replacement cartridges are always available online and can now be purchased on Amazon (ASIN B014PTC8XS). Best performance water temperature - 36F to 113F (2C - 45C) HotelSpa® Advanced High Intensity Super Compact Universal Shower Filter is directly connectable to your regular shower head, easy to install as well as easy to maintain and is packed with the ultimate combination of three most powerful water-filtration media (KDF, Calcium Sulfite and Active Carbon) which is known to: • Help reduce chlorine and its vapors, damaging chemicals, heavy metals, minerals and impurities from your shower water • Reduce exposure to radioactive Iodane, Radon and Hydrogen Sulfide • Discourage the growth of mold, mildew and algae • Improve water's pH Balance Negative Effects of Chlorine • Daily showering with chlorine-treated water is the leading cause of dry damaged skin, flaky scalp and limp hair • Prolonged exposure to high levels of chlorine can also lead to skin disorders, respiratory illness and even some forms of cancer • As you shower, chlorine and its steam vapors generated by hot water are absorbed by your body through skin • By dramatically reducing levels of chlorine and other damaging compounds in your shower water, you will avoid further intoxication and improve your health