DutchPro CalMag, 10 LiterDutchPro Calmag helps to boost your plants' chlorophyll production while fighting Magnesium and Calcium deficiencies. Calcium and magnesium are two of the macro elements that are significant to the growth and development of plants. Calcium (Ca) is a critical structural component of cell walls. Magnesium (Mg) is part of the chlorophyll molecule, which makes up the green pigment of leaves and, most importantly, absorbs energy from sunlight, which