Superdensa 7 kg / 10 litersSuperdensa is a complete breeding ground for plants that grow completely under water, the so called oxygen plants. These plants play a very important role in the pond environment: They absorb large amounts of nutrients and provide oxygen rich water and thus a healthy pond. Superdensa is specially formulated for the planting of these important oxygen plants. It prevents rotting phenomena from the lower parts of the plant and stimulates a strong growth