Cleaner for Calcium Build Up Set, Pumice Stone for Pool Tile Cleaning, Calcium Remover for Tile & Plaster Stain, Grout & Concrete Scouring

This floating natural pumice stone scrubs away lime, rust, and mineral buildup along your pool's waterline with ease on ceramic tiles, grout, concrete, gunite, and pool plaster without harsh chemicals or draining the pool, though it is not for use on vinyl, fiberglass, wood, or chrome—please test on a small hidden area first.

• Effortlessly removes stubborn waterline stains. This pumice stone easily erases limescale, rust, and mineral deposits along your pool's waterline. Works exceptionally well on ceramic tiles and pool plaster, leaving surfaces clean and looking like new. Be sure to test on a small, inconspicuous area before first use.
• 100% NATURAL PUMICE – NO CHEMICALS ADDED：Made from pure natural pumice stone with zero cleaning additives. It scrubs off calcium and hard water deposits without introducing any extra chemicals into your pool water. Safe and gentle, yet tough on buildup.
• FLOATS FOR UNDERWATER CLEANING – NO DRAINING NEEDED：The stone floats, so you can scrub stains while the pool stays full. No pumping out water required. It easily conforms to tile curves and corners, making it simple to reach every spot.
• WORKS ON TILE, GROUT, CONCRETE & GUNITE – BUT AVOID THESE：Perfect for ceramic tiles, grout, concrete, and gunite surfaces. Also removes stains from pool plaster. Not for use on vinyl, fiberglass, wood, or chrome. Always test on a small, out-of-sight area first.