Elevate Essentials All Purpose Pumice Stone

Size: Large (2x2x5.5in) *REMOVES DEEP STAINS *REMOVES HARD WATER RINGS FROM TOILET AND POOLS *REMOVES RUST AND PAINT *REMOVES CARBON BUILD UP ON TOILETS *USE AS A TOILET PUMICE STONE Because of high demand please allow 12-20 DAYS for shipping. Guaranteed safe and secure checkout!     M⭐⭐⭐⭐⭐ - Worked like a champ!Reviewed in the United States on August 28, 2016I've tried several different pumice stones to remove scale (calcium?) on the walls of my pool, and the comments that mention "these are too soft" may not have tried others...pumice is a very soft stone, and that's part of how it works...removes the scale without damaging the Gunite/Plaster surface since pumice is MUCH softer. Try anything harder and you'll be removing plaster...that's not the goal.What makes these bars a great value is their size. I paid nearly twice as much for a single, much smaller bar at the pool store. These actually worked a bit better, but because they are so big, I actually finished the job this time (14