Oxy Splash OXSP25 25 lb Non Chlorine Water Purifier. OXY SPLASH is an excellent alternative for routine shocking with chlorine. It works by breaking down chlorine byproducts and reducing chlorine consumption in pool water.. OXY SPLASH contains one of the highest percentages of Active Oxygen and is safe for frequent use in all pools & spas and swimming can resume just 15 minutes after dosing.