Calcium is a secondary essential macroelement that helps lengthen roots and build strong plant cell walls. Symptoms of calcium deficiency are sometimes noted in plants, especially those grown in coco coir.
Carbohydrates (a.k.a. “sugars”) are an important source of fuel for hydroponic crops. Carbohydrates feed the beneficial microbes in the root zone. Some carbs are also taken up by the plant through the roots. Growers use carbohydrate supplements to give their plants more energy during budding and flowering.