| Stock solution 1: | Stock solution 2: |
| 10 g glucose | 1.86 g CaCl2·2H2O |
| 0.6 g KH2PO4 | 4.0 g KCl |
| 3.58 g Na2HPO4·7H2O | 80.0 g NaCl |
| 20 ml 0.5% phenol red | 1.04 g anhydrous MgCl2 |
| H2O to 1 liter | 2.0 g MgSO4·7H2O |
| H2O to 1 liter |
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