1、Professional CO2 generator system with stainless steel bottle, better than simple plastic bottle generators. It is more reliable, steady, durable and efficient. 2、Bubble counter with check valve: Flow-rate of CO2 gas indication device and prevent water flow back into the regulator. Solenoid valve: To control the on and off of CO2 generator system using with a timer(not included). 3、Come with a bubble diffuser, refine the bubbles and make it easy to dissolve in water and be absorbed by plants. Inject to your aquarium with CO2 quickly and easily. 4、Large amount of CO2 may cause fish dead. It is recommended to reduce the CO2 volume at the beginning, 1 or 2 bubbles per second. One time\u0027s reaction can last for 3 to 4 weeks using. 5、Any problem, please contact our store without hesitation. Honor to serve you! 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 for making CO2 equipment at home. Features: Professional CO2 generator system with a stainless steel bottle, better than simple plastic bottle generators. It is more reliable, steady, durable, and efficient. Bubble counter with a check valve: Flow-rate of CO2 gas indication device and prevent water flow back into the regulator. Solenoid valve: To control the on and off of the CO2 generator system using a timer(not included). Come with a bubble diffuser, refine the bubbles and make it easy to dissolve in water and be absorbed by plants. Inject to your aquarium with CO2 quickly and easily. A large amount of CO2 may cause fish dead. It is recommended to reduce the CO2 volume at the beginning, 1 or 2 bubbles per second. One time's reaction can last for 3 to 4 weeks using. Any problem, please contact our store without hesitation. Honor to serve you! Specification: Name: CO2 generator system with solenoid bubble diffuser Main material: Stainless steel Main color: Silver Voltage: AC 100V-240V input; DC 12V output Size: Height: 53cm; diameter: 10cm Raw material ratio: Citric acid 200g+baking soda 200+water 300g Note: Excessive or double addition of raw materials and water is prohibited. Invert the bottle and disassembly are prohibited. Package Information: Package size: 15*15*60cm Package weight: 2195g Gift Box Packaging Packing List: 1* Stainless steel cylinder container 1* Top pressure reducing valve device 1* Solenoid valve 1* Stainless steel diffuser 1* Cylinder base 1* Bubble counter 1* A set of other fittings 1* English manual 1* Stainless steel cylinder container 1* Top pressure reducing valve device 1* Solenoid valve 1* Stainless steel diffuser 1* Cylinder base 1* Bubble counter 1* A set of other fittings 1* English manual