Rust Guard Bowl Cleaner 4oz pack of 6

- Advanced Rust Prevention: This unique formula effectively prevents the formation of rust stains and hard water mineral build-up in both your toilet bowl and reservoir, keeping your toilet clean and fresh for up to a full month with each concentrated time-release tablet - Safe Chemical-Free Formula: Contains no harsh acids, caustics, chlorine bleach, phosphates, or artificial dyes, making it a gentle yet effective cleaning solution that won't damage your plumbing system or harm household pets - Plumbing-Friendly Design: Unlike chlorine bleach cleaners that can corrode and attack plumbing components, this toilet tablet is specifically formulated to be safe for all types of plumbing systems and septic tanks, ensuring long-term protection for your home's infrastructure - Long-Lasting Protection: Each 4-ounce solid tablet provides continuous cleaning action for up to 30 days, with this convenient 6-pack offering six months of worry-free toilet maintenance and protection against stubborn stains - Odorless Cleaning Power: Features a white to off-white solid tablet with an odorless formulation containing sodium hydrosulfite, sodium tetraborate pentahydrate, and a non-ionic surfactant blend at a balanced 6 to 6.5 pH level for effective yet gentle cleaning