Setting a New Standard in Pool Cleaning - Faster, Cleaner, Chemical-Free
Waterline scale, algae shadow, rust streaks and mineral stains are the stubborn end of pool care. The recycled-glass pool block tackles all of them with nothing but abrasion and water - so unlike chemical cleaners, it will never disturb the chemical balance of your pool.
What It Cleans
A wetted foamed-glass block scrubs away algae, rust, grit and mineral deposits from gunite, plaster, tile, grout and concrete. Its signature trick is the waterline: calcium scale builds where water meets tile, and the block conforms to the surface to clean everything between and around the tiles - grout lines included - without gouging.
Why It Beats the Alternatives
- Versus chemical cleaners: acid-based tile cleaners work, but they wash into the pool and push your water chemistry around. A glass block adds nothing to the water. Balanced water is the foundation of safe swimming - see the CDC's healthy swimming resources for why chemistry stability matters.
- Versus conventional scrubbing: the original manufacturer measured block cleaning at up to seven times faster than scrub pads on heavy scale.
- Versus natural pumice: roughly twice as fast, with a more consistent cell structure that erodes grout more slowly. Used wet and held flat, it scrubs super clean without scratching tile or grout.
Working the Waterline
Keep the block thoroughly wet, let it shape itself to the tile profile, and work with light, steady strokes - the abrasive does the cutting, not your arm. Full technique is on the usage tips page, and user reports cover real-world results on everything from fiberglass steps to twenty-year-old grout.
A Note on Delicate Finishes
Glass foam is gentler than pumice, but any abrasive deserves a test patch on painted finishes, vinyl liners, or polished stone copings. (Vinyl and painted surfaces are generally not candidates for abrasive cleaning at all.) For everything mineral - tile, grout, plaster, gunite, concrete block coping - the stone is in its element. See the rest of the family in the product guide.