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Star San is also a self foaming sanitizer. It can be applied through a foamer to produce self-adhering sanitizing foam for external sanitation. Star San is also an excellent sanitizer for hand application. Sanitizing with Star San on a daily basis will leave equipment in a acid condition that will eliminate water spotting. It is not recommended to use Star San on soft metals because of the acid nature of this product.
Usage is 1 oz per 5 gallons of water. Distilled water is best with the product but tap water is fine as long you do not have a mineral content in your water. When stored correctly your diluted star san can be used for up to 6 months as long as the pH does not go above 3.5. This is makes it perfect to store in spray bottles for quick use.