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No. 1a conc. This is a substitute for the No. 1 or ALUMA BRITE when a non-hydrofluoric acid solution is preferred. In its’ concentrated formula, this product does not require any further dilution and should be metered at 1:100. Or one can make 4 and meter at 1:25 ratio just like the No.1.
Contains Phosphoric and Citric Acids and is USDA approved.