US Pumice Pool Blok Pumice Block with Handle 6 oz 6 in. H X 1.5 in. W X 1.5 in. L

Cleans where chemicals fail. Removes lime, rust, stains and algae deposits from ceramic tile, molded and pneumatic formed concrete surface pools and spas. No need to drain pool. Chemically neutral. Wont upset pH balance. Works through abrasive action and rubs out deposits without harm to pool surfaces. Removes lime and rust stains and algae deposits from ceramic tile or molded or pneumatic formed concrete surfaces.