Pool Blok, 6" x 1.5" x 1.5", Pool & Spa Cleaner, With Telepole Adapter, A Pure Pumice Scouring Stone Cut & Sized For Spot, Surface & Underwater Cleaning Of Recreational Swimming Pools & Spas, Ideal As A Spot Cleaner For Rust Marks, Algae Or Leaf Stains, Pool Blok Quickly Shapes To Any Surface, Concrete, Masonry & Hard Metal Surfaces.

Cleans even when the strongest acid chemicals have failed
Pool Blok quickly shapes to any surface
A pure pumice scouring stone cut and sized for spot, surface and underwater cleaning of recreational swimming pools and spas
Ideal as a spot cleaner for rust marks, algae or leaf stains