Pool Blok Pumice Stones for Pool Tile Cleaning — 12-Pack, Floating Chemical-Free Abrasives for Calcium & Rust

Pool Blok Pumie pumice stones are a chemical-free abrasive tool that scrapes away lime, rust, and mineral deposits from pool tile, grout, concrete and plaster without draining the pool.

When mineral scale builds at the waterline or plaster picks up stubborn stains, a manual abrasive often removes deposits faster than chemicals alone. The Pool Blok Pumie 12-pack supplies natural pumice scouring sticks sized to float and conform to curved tile and plaster, letting you scrub away calcium and rust spots with controlled pressure. These pumice stones are intended for hard surfaces — always test a small hidden area first to confirm compatibility.

How does the Pumie work on a tiled waterline?

The pumice is a naturally porous volcanic rock that abrades mineral deposits while leaving ceramic glaze intact when used gently. Floating design keeps the stone accessible at the waterline, and the size makes it easy to hold for targeted scrubbing.

• Removes lime and calcium scale from ceramic and glazed tile surfaces
• Floats so stains can be reached without lowering water
• Shapes to edges and grooves for grout and corners

Will it damage pool plaster, grout, or concrete?

Used with light to moderate pressure, the pumice is safe for plaster, grout and concrete surfaces but can be too aggressive on softer finishes. Avoid power scraping and always try a test spot; the abrasive effect is effective because it physically removes deposits rather than dissolving them.

• Recommended: ceramic tile, plaster, grout, concrete, gunite
• Not recommended: vinyl liners, fiberglass, chrome, painted finishes
• Tip: use gentle strokes and rinse the area after scrubbing

How does this compare to chemical calcium removers?

Pumice provides an additive-free cleaning option that reduces reliance on acidic chemicals and can be used where you prefer mechanical removal. It won’t neutralize embedded stains that require a chemical reaction, but it excels at scraping away surface scale and rust deposits.

• Natural, no harsh chemical additives
• Good for spot cleaning and localized stains
• Complementary to chemical treatments when scale is stubborn

How should I use and maintain the pumice stones?

Wet the stone and the stain area, then rub gently with back-and-forth motions until the deposit loosens. After use, rinse the pumice and let it air dry; discard if it becomes overly worn or breaks into small abrasive fragments that could scratch delicate finishes.

• Wet both stone and surface before scrubbing
• Apply light, controlled pressure; avoid scraping aggressively
• Rinse scrubbed area to remove loosened particles and test first

Who this product is for: Pool Blok Pumie pumice stones suit pool owners, service technicians and facility managers who need a reliable, non-chemical tool for removing waterline mineral deposits, rust spots and plaster discoloration. They are ideal for targeted spot-cleaning on ceramic tile, grout and concrete surfaces, and handy as a multipurpose scouring stick for hard-water stains in bathrooms. If you have delicate finishes like vinyl liners or fiberglass, consider testing a hidden area first or choose a softer cleaning method.