AquaCare by HotelSpa Enriched KD Shower Filter Replacement Cartridge for use with Advanced High Intensity Super Compact Universal Shower Filter or Filtered Shower Heads/Handheld Showers This disposable Enriched KDF Shower Filter Replacement Cartridge can be used either with AquaCare by HotelSpa Advanced High Intensity Super Compact Universal Shower Filter (ASIN B014PQTUHS) or HotelSpa Filtered Shower Heads/Handheld Showers. 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. Best performance water temperature - 36F to 113F (2C - 45C) 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