This powerful scrub pad is strong enough to tackle tough grime, but gentle enough not to scratch surfaces. Use it for all your outdoor needs, including hot tubs, pools, pool toys, patio furniture and more. For more than 25 years, FROG has sanitized pools, hot tubs and swim spas in its unique, patented way. FROG features prefilled cartridges for no mess, no guess, and no stress pool and hot tub care. Each FROG product uses Fresh Mineral Water∞ to make your water Cleaner, Clearer, Softer and Easier®. And now FROG offers an easy way to solve common pool problems like algae and cloudy water with FROG Pool Solutions. No matter what size pool or hot tub you have, we make a product for it!