DIY CO2 kit for Aquarium with CO2 Diffuser & Needle Valve, G211

About this item

• 【Presented Diffuser】4 in 1 CO2 diffuser has bubble counting function and built-in check valve.
• 【Presented Starting Tube】Say goodbye to the old frequent squeezing of the bottle, use this item, just shake and wait for a while to reach the green pressure range.
• 【Upgraded valve】Metal needle valve, can be easily adjusted to 4-5 seconds/1bubble. More accurate and durable.
• 【Upgraded Safety valve】 The pressure relief value is more accurate and durable than the original simple pressure relief valve.
• 【Tips】1.The needle valve is only used to adjust the output volume, It only need to be adjusted once. Daily switching can be controlled by the white on/off valve. The reason for this is to ensures the gas output is stable. 2. DO NOT use bottles other than carbonated beverage bottles.