Frog Maintain for Swim Spas is a granular product for periodic shocking of larger spas. It’s a single dose, easy-to-pour pouch for an simple maintenance shock treatment to keep your water crystal clear. No measuring, no guess, no mess. The swim spa is ready in 15 minutes after shocking. Once in the water Frog Maintain will quickly dissolves and eliminate organic contaminants. As an added benefit, it is a non-chlorine shock, which means you get the cleaning action without any Cyanuric Acid, ever.