Replacement cartridge only, for the Vitamin C Shower Filter SF-1. Vitamin shower filters (Vitashower) use pharmaceutical grade Vitamin as DE chlorination agents. Each Vitashower contains roughly 250 grams of Vitamin and is capable of neutralizing 1 ppm chlorine in 25,000 Gallons of water. Since different attributes of water will affect your actual results, it lasts for approximately 15,000 Gallons of water (6 months to one year).
