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| Amount of water | Amount stock added | Stock concentration |
| Liter | gram | g/L |
Clay | 11L 11 | 22.2 g | 2.02 g/L |
Alum | 11L 11 | 16.5 g | 1.5 g/L |
Humic acid |
| 0.375 g | 3.5 mg/L |