Seachem PristinePristine uses a non chemical and natural method to improve water quality. It provides bacteria that break down excess food, waste and detritus in freshwater and marine systems. It will also reduce excess ammonia, nitrates, and nitrites that may fuel the growth of disease causing organisms. Features: Natural organic waste management Rapidly and safely eliminates sludge and detritus Helps increase water clarity Marine and freshwater Directions: Shake