FROG @Ease In-Line System Value Pack - 1 Mineral Cartridge plus 3 SmartChlor Cartridges for Marquis Spas, Caldera Spas, Artesian Spas and Hot Springs Spas.

Introducing FROG® @ease® In-Line System Cartridges – Your Shortcut to Effortless Hot Tub Maintenance! This breakthrough in Hot Tub sanitizing is made specifically for Hot tubs manufactured with the built-in FROG® @ease® In-Line System (fits Marquis Spas, Caldera Spas, Artesian Spas and Hot Springs Spas that include the FROG In-Line cartridge option).  Simply open the cap on your hot tub, snap in the conveniently adjustable cartridges, and enjoy weeks of cleaner, clearer and softer water.  A patented combination of FROG Minerals and SmartChlor® Technology creates Fresh Mineral Water® by attacking bacteria in two ways with much less chlorine and a lot less work!  FROG proprietary mineral technology offers 4 distinct advantages: CLEANER, because it kills bacteria in two ways with minerals and a low level of chlorine. Minerals help keep the pH balance for CLEARER water that shines. Minerals condition the water for a SOFTER Cartridges are prefilled for no mess, no guess, no stress - mak