So I waited 3 months before writing this review to see how well they worked. I can honestly say I am pleasantly surprised at the results. I normally have horrible hard water stains that appear after a week or 2 of scrubbing them off. After 3 months of dropping these in my tanks, they have not re-appeared! My toilets look amazing. I was hesitant to spend $99 for all three of my toilets but this product is well worth the money. I would highly recommend them if you suffer from hard water stains!

I was skeptical, but this works, 2 weeks in and no ring. We have very hard water where I live and this is a blessing in fact I’m ordering my 3rd one.

Happy bowls are a nice pleasure as thanks for a great product

These things are great. I have fought for years to get my tank to stay clean. Wow, I am impressed, they really work. I can't recommend them enough. You still have to clean the bowl, but I'm okay with that, just not as much though.

I had my doubts, but it really does work. It’s taken that darker ring out of my toilet bowl….
Thank you 😊