Be made of stainless steel. It is strong, durable and efficient.
Well-sealed caps and pipes, leak-proof, non-deformed, never loose.
Professional pressure gauge for pressure watching.
Cheap, simple to create pure CO2 constantly by chemical reactions.
Equipped with a safety valve, the pressure is greater than 4kg pressure will relief automatically, carbonated beverage bottle pressure is 8kg, safety is ensured
B&K Aquarium DIY CO2 Generator System Kit with and without Solenoid Valve Bubble Counter & Check Carbon Dioxide Reactor Kit for Plants Aquarium