Works Great
Developed an unknown stain in guest bath Toto toilet.  The stain was only in the one toilet; the others were still perfect. Tried everything to remove the stain.  Stumbled across this Pumice Cleaning Stone and figured had nothing to lost by trying it; it was less expensive than buying and installing a new toilet. The Pumice Cleaning Stone removed the stain and now the toilet has its original look. Yet to see how long it last and whether the pumice scratches the porcelain over time.
Rating: 5 stars