Just add citric acid, baking soda, water into the bottle, which can produce carbon dioxide. The plant metabolic rate can be increased quickly, create the best growing conditions for fishes. It is the best choice of making CO2 equipment at home. It is easy, safe, and economical. Raw material ratio: A Bottle: Citric Acid 200g+Water 600g; B Bottle: Baking Soda 200g+Water 200g. Features: Be made of aluminum alloy. It is strong, durable, and efficient. Well-sealed caps and tubes, leak-proof, non-deformed, never loose. Professional pressure gauge for pressure watch. Cheap, simple to create pure CO2 constantly by chemical reactions. Solenoid valve: To control the on and off of CO2 generator system using a timer(not included). Bubble counter with a check valve: Flow-rate of CO2 gas indication device and prevent water flow back into the bottle. Equipped with a safety valve, the pressure is greater than 4kg pressure will relieve automatically, carbonated beverage bottle pressure is 8kg, safety
