Fluidmaster Flush N' Sparkle Septic Tank Refill Cartridge Green Plastic

These replacement cleaning cartridge for Flush N' Sparkle with Bio Balance Septic Care Kit automatically cleans your toilet with every flush. This environmentally friendly product provides cleaning solution directly into the bowl without harming the toilet tank components. The Flush N' Sparkle refill pack includes two septic refill cartridges giving you a total of 6 months worth of hands-free cleaning.