Potable Aqua Tablets are a very quick and easy way to get your water clean and drinkable. These purification tablets turn that questionable water into a suitable drink. Use this purification tablet for an emergency or short term camping use. The Potable Aqua Tablets are proven effective against Giardia Lamblia when used as directed. Potable Aqua is the first step in the treatment process, use with Potable Aqua Plus to then remove Iodine taste and color.