EcoOne® One Shock, the pioneering pre-measured spa and shock sanitizer combo. Say goodbye to mixing and measuring hassles—simply drop in the One Shock tablets following the recommended directions, and you're all set! Packed with all the essential ingredients for a pristine, bacteria-free spa experience, our ultra-effective tablets make maintenance a breeze. Simply amazing!

Active Ingredient: sodium dichloro-triazinetrione dihydrate (dichlor).