Yeast extract 5 g NaCl 61 g MgCl2 5.3 g MgSO4 7.2 g CaCl2 0.27 g KCl 1.5 g NaHCO3 0.045 g NaBr 0.02 g Agar 20 g Distilled water 1000 ml pH 7.0 - 7.5