Review on Effortless Cleaning: Kaboom Scrub Free! Continuous Clean with OxiClean 3-Pack Refill by Petr Webster

We heard about this product a few years ago and tried it in our toilets. It got rid of the brown (iron based) sediment that had built up at the bottom of our toilets as well as the horrible blotchy black rings in the plumbing in the toilets. We used to have to clean every third day. Now we clean once a month. Use a "bypass" to avoid destroying the seals in the tank. We have a septic tank and it hasn't impacted operations negatively so we're overjoyed.