Peters Professional 20-20-20 utilizes acidifying action to combat excessive pH in mineral-heavy growing media. The world’s leading water-soluble fertilizer, Peters Professional products are super-charged with M-77®—ICL's proprietary chelating formula—for the most efficient uptake of nutrients and trace elements. Used as a baseline fertilizer or a solution to a particular need, Peters Professional provides the quick response and robust growth that produces healthy margins at retail.