Perfect for hard water stains
I have really hard water at my house and as a result, it ends up leaving hard water stains in the toilet, bath, shower - everywhere!  No cleaner gets these stains off - I had to google what was effective.  Pumice stones are amazing, but they wear away (so you need the pack of six!  I am able to clean my entire house, 3 toilets and 3 tub/showers and there is only about an inch of wear on the stone.  It works on glass (with water) and all porcelain.  I also have a cast iron tub and it works wonderfully on getting the hard water stain out.  Highly recommend pumice stones for anyone that has grime or grit in their bathroom.
Rating: 5 stars