The Dennerle Carbo POWER E400 Set Special Edition is an advanced CO2 injection system designed to enhance the growth of aquatic plants in freshwater aquariums up to 400 liters (105 US gallons). This set includes a precision pressure reducer made from milled aluminum, ensuring accurate and reliable carbon dioxide supply. The dynamic valve control feature maintains a constant CO2 level, while an adjustment knob allows for precise fine-tuning according to the specific needs of your aquarium setup. Additionally, this special edition features a magnet valve for added convenience.