Whink RustGuard Bowl Cleaner 4oz 2tabs
These time-released bowl cleaner tabs unique formula prevents the formation of rust and hard water build-up in the toilet bowl and reservoir. Whink Rust Guard outperforms all major bowl cleaners and does not attack plumbing or septic systems such as occurs with chlorine cleaners. The tablets contain no acids, caustics, chlorine bleach, phosphates or dyes. Each time-release tablet fights rust and hard water stains for 3-6 weeks depending on frequency of flushing, water temperature and water pressure. This product does not harm pets, plumbing and septic systems.