HESI CalMag

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HESI CalMag supports the mineral side of a feeding plan when water or substrate conditions leave calcium and magnesium short. It is a correction tool, not a general weekly treat. B alance before feeding CalMag prepares the mineral background so the chosen base fertilizer can work more predictably. It is not a replacement for plant food and is not a universal weekly extra. For controlled corrections Reach for it when the setup points to a calcium or magnesium gap. For a straightforward feeding plan, start with a complete fertilizer and add CalMag only when the water or medium calls for it. Show more