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	1.28𝑒^+3	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