Research Article
New Medium for Pharmaceutical Grade Arthrospira
Table 2
Water hardness of the different used media.
| | A-St 2x | A-St 1.5x | A-St 1x | George’s | Zarrouk’s |
| MgSO4 | 0.0125 | 0.0094 | 0.0062 | 0.0008 | 0.0082 | CaCl2 | 0.0003 | 0.0002 | 00001 | — | 0.0009 | Equivalent mg L−1 or ppm of CaCO3 | | 957 | 628 | — | 907 | French degree | 128 | 95.7 | 62.8 | — | 90.7 | German degree | 71.4 | 53.6 | 35.2 | — | 50.8 | English degree | 89.3 | 67.0 | 43.9 | — | 63.8 |
| Water hardness | Very hard water | Very hard water | Very hard water | | Very hard water |
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