Whink RUSTGuard Time Released Toilet Bowl Cleaner Tablets – Pack of 2

Stops Rust With Every Flush. This unique formula prevents the formation of rust and hard water build-up in your toilet bowl and reservoir! RUSTGuard contains no acids, caustics, chlorine bleach, phosphates or dyes and won't attack plumbing like chlorine bleach cleaners can! Safe on all plumbing and septic systems. Won't harm pets. Use to prevent the buildup of rust and hard water stains in toilet bowls and reservoirs 2-in-1 formula contains no chlorine bleach, phosphates, dyes, caustics or acids Simply place one tablet inside of the toilet tank to prevent rust stains Safe for use in all septic systems, plumbing and colored toilet bowls Tablet dissolves into thick gel in tank and continues working for up to a month