5 Tips for Using a Pumice Stone on Calcium Scale

Wet both the stone and tile first Dry pumice leaves gray marks that are hard to rinse off. Keep everything wet to avoid this.

Work in small circles with light pressure Press too hard and you risk damaging the tile. Rinse frequently to check your progress.

Stop if the deposit is too thick If it doesn’t come off after a few passes, switch to a mild acid wash instead. Pumice won’t cut through heavy buildup.

Never use metal scrapers or sandpaper They scratch the glaze, making future calcium deposits bond even harder. Pumice is soft enough to avoid this.

Replace the stone when it feels like sandpaper A fresh stone is cheap and works better. Throw out worn ones after a minute of use.