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Cal mag ??
Student_of_Sciencestarted grow question 3y ago
Should the cal mag be half as well ? And how long does it get added?
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Chow_13answered grow question 3y ago
Are you using RO water or distilled water? If your using tap water then chances are you wont need it and if you do then only 1/8 - 1/4 the amount recommended MAX.
If your using water with less then 100 ppm then yes, you want to add 1/4 -1/2 recommended.
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