Lenicany 6Pack Pumice Stone for Toilet Cleaning Bowl Stick,Powerfully Cleans Hard Water Rings，Calcium Buildup & Stains, Suitable for Cleaning Toilet, Bathtubs, Kitchen Sink, Grill

This + good ole elbow grease are magic! Took care of the nasty residue in the toilet.

These make my toilet and sink look like new!!! A must stock up, specially if you have hard water in your area!

Works great! But crumbles fast

These are fantastic for cleaning toilet bowls! They easily and quickly remove hard water deposits and the black stuff that a plastic bristle brush and cleanser will not. No nasty chemicals go into the water system. They are consumed during use. I would say they are good for 3 uses on moderately funky toilets.

Used to be able to get these at the .99 store for a buck! Now you cant find them anywhere. Good thing Amazon has them for a great price. You get ALL 6 for about 1.00 each. These are GREAT for getting hard water stains off the toilet ring.

Im not sure if there are micro scratches to the bowl, but it was able to make it look new and Ive tried for over a year with various liquid cleaning products without much success. This took about 5 minutes to clean the whole bowl. Im very impressed it was so easy and 3 toilets and more than half a stick left.

Was able to get that ring off. Did not scratch the toilet. Will be purchasing again.

nothing else works but this stone to remove the hard water buildup it is a must have

I clean houses. We have highly mineralized water so I use these to remove calcium deposits from tubs and toilets. They require elbow grease but will remove the deposits without damaging the porcelain. Don’t use on metal though. Will scratch up fixtures.

Hard water line in commode almost impossible to remove without scratching bowl …. Not anymore easy to use cheap works ……. I’m on city water