Salt substitutes included chlorides, sulfates and phosphates at 25%, 50% and 100% ionic strength equivalent to a concentration of 1M NaCl. At 100% NaCl substitution, chloride salts provided the most selective environment and sulfates showed no selectivity, whereas phosphates suppressed microbial, growth. Substitution of sulfates for NaCl generally increased generation times for both microorganisms. Substitution of KCl for NaCl at 50%, resulted in more selective growth of L. plantarum than in those with either KCl or NaCl alone. KCl was the only chloride substitute allowing growth of E. cloacae. Substitution of phosphates for NaCl at 50% enabled slow growth of L. plantarum.