Bacto peptone 5 g Bacto yeast extract 1 g Fe(III) citrate 0.1 g NaCl 19.45 g MgCl2 (dried) 5.9 g Na2SO4 3.24 g CaCl2 1.8 g KCl 0.55 g Na2CO3 0.16 g KBr 0.08 g H3BO3 22 mg (NH4)NO3 1.6 mg Na2HPO4 8 mg Distilled water 1000 ml Adjust pH to 7.6 +- 0.2 Sterilize at 115°C for 20 min.