Nutrient Deficiencies/Toxicities : Hydroponics ...
Nutritional disorders include deficiencies of nutrients, toxicities or excesses of nutrients and other elements, and excessively high or low acidity. In hydroponics one can expect deficiencies of most of the essential nutrient elements,, nitrogen, potassium, calcium, magnesium, sulfur, phosphorus, iron, manganese, boron, zinc, copper.