It removes calcium, lime, and hard-water stains using gentle abrasive action and cleans porcelain fixtures, pool tile, toilet bowls, barbecues, steel, and stone.
Promising review: “I have a 19-year-old bathroom toilet that had accumulated some nasty stains over time, and regular toilet brushes and cleaning products just would not remove them. I decided to try this pumice stone, and it worked like a charm! Given the nature and severity of the stains, it required some elbow grease. But 10 minutes later, I have a new-looking bowl, and I see no signs of scratching.” —Happy Retiree
Get it from Amazon for $13.99.
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