Besides the conditions meeting lighting, CO2 and water quality to grow aquatic plants, the last required know-how is to add liquid fertilizers. Essential nutrients for aquatic plants are the three major nutrients (nitrogen, potassium, iron) and also, some microelements, required even in small amounts, such as iron, magnesium, and calcium.
It is important for aquatic plants to be nourished just the right amount in order to grow healthy without algae outbreaks.