InSinkErator CG Evolution Septic Assist Bio Charge Replacement Cartridge, 16-Ounces, Blue Product Description Replacement cartridge for Septic Disposer (1651-2196); Eliminates need for extra additives; Natural enzymes help break down waste. From the Manufacturer Septic Disposer Bio Charge Replacement Cartridge; Manufactured by the World's Largest Disposer Manufacturer Features SCENTED ENZYME TREATMENT: Citrus-scented Bio-Charge Replacement Cartridge for Evolution Septic Assist garbage disposals contains a natural microorganism that help break down food waste. Automatically dispensing when Septic Assist Disposal is on. LONG LASTING SIMPLE INSTALL: Cartridge lasts 3 to 4 months with average use - equivalent to 4 bottles of other septic treatments. Install: turn the blue cap counter-clockwise until stem pops up, insert and lock in place, prime disposal 4 times. AMERICA'S #1 DISPOSER BRAND: There are more American-built InSinkErator garbage disposals in US homes than all other brands combined. A full line of models means there's one right for every need and budget. FASTER, CLEANER, SMARTER: From meal prep to cleanup, InSinkErator helps make it fast easy to keep your kitchen clean with our iconic appliances: garbage disposals instant hot water dispensers. A HISTORY OF INNOVATION FOR THE SINK: We invented garbage disposals in 1927, we're the world?s largest manufacturer of garbage disposals instant hot water dispensers for home commercial use.