1
25 ml solution 1 (4 g NaCl, 0.2 g KCl, 0.05 g MgSO4 x 7 H2O, 0.05 g MgCl2 x 6 H2O dissolved in 25 ml distilled water; then 0.0925 g CaCl2 added and dissolved) and 25 ml of solution 2 (0.075 g Na2HPO4 x 2 H2O, 0.03 g KH2PO4 dissolved in 25 ml distilled water) are autoclaved separately and then combined with 450 ml sterile H2O.
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