Low Salt Index. No Phosphates. No Nitrates. No Chlorides. A building block for protein, Hydra-Base 18-0-6 is a phosphate free foliar fertilizer with 100% quick release urea. Potassium derived from potassium acetate (KA) for superior foliar uptake. Hydra-Base Nitrogen is broken down both chemically and biologically, which provides a lower use rate for higher quality results. Tank mix compatible with most pesticides.