CrystalClear, 16 OZ RapiClear, Designed To Clear Cloudy, Muddled Pond Water Quickly, Usually Within 1-3 Hours Depending On The Size Of The Pond, Quickly Restores Pond Water To A Brilliant Shine, Allows Suspended Particles In Water To Attract Together & Fall To The Bottom Of The Pond Where They Can Be Vacuumed Out Or Removed By Filtration, Safe For All Aquatic & Domestic Animals.