99% PURE BORIC ACID AKA Orthoboric Acid, Boracic Acid (2 lb) Also know as hydrogen borate, it can be used as a naturally occuring all purpose cleaner. Use it as an algae cleaner and preventor, reduce your chlorine levels, or level out your pH alkalinity all in your pool. 99.9% PURE Boric Acid AKA Hydrogen Borate, Boracic Acid, Orthoboric Acid and Acidum Boricum Highly effective all-purpose cleaner. It will help remove bacteria and stubborn stains left behind on carpets, upholstery or countertops.