Maintain toilet's inner workings without scrubbing.Simply pour a packet of septic safe, chlorine-free HurriClean automatic toilet cleaner into the tank each month for renewed performance. Let it sit overnight. Flush in the morning. Your toilet will work like new! Removes tank and jet-clogging mold, rust, and grime. Won't harm rubber or plastics. No scrubbing required. 5.34 oz. Includes 3 cleaning packs for instant stain removal.