Pumie® Pool Blok® Tile & Concrete Cleaner acts as a powerful surface cleaner, effortlessly removing lime, scale, rust, stains, and algae deposits from ceramic tile, grout and molded or pneumatic formed concrete surfaces. Non-toxic solution for pool maintenance needs, providing a chemically free solution for effectively cleaning pool and spa surfaces. No need to drain the pool and chemically neutral, therefore a safe and reliable option for maintaining your pool's water quality without disrupting its pH balance. Convenient and ready to use without the need for gloves. Great for spot, surface, and underwater cleaning. Safe for skin contact and can be used around children and pets. Pumie® has been a trusted choice for more than 75 years among cleaning professionals, ensuring it's more than capable of handling the toughest stains and buildups.