Good atomization effect reverse osmosis atomization tube with lower pressure requirement and finer mist output. Requires only pressure above 0.12 MPa to release air. Tubular atomizing core provides a larger atomization coverage area compared to traditional models. Eco-friendly design utilizes reserve penetration technology to diffuse CO2, enhancing dissolution efficiency and reducing CO2 consumption for improved environmental performance. Installation Steps: Tighten the upper and lower shells by hand without using tools such as wrenches to prevent damage. Do not over-tighten the air pipe locking nut; slight tightness is sufficient to avoid damaging the air pipe. Note: The external atomizer may produce a slight "squeaking" sound during operation. This is normal and results from the CO2 gas atomization process, not a leak. High quality construction using premium materials. Non-toxic, safe, energy-saving, and durable for long-term use. Features a secure nut lock system that effectively secures both CO2 and water pipes to prevent loosening. Specifications: Condition: Item Type: Aquarium CO2 Atomizer Color: As shown in pictures Material: Plastic Instructions: 1. The atomizer is not fully tightened when shipped and must be tightened by the user. 2. Do not use tools such as wrenches for installation or removal to avoid damage. 3. The atomizer contains a precision ceramic tube that must be fully saturated with water to achieve optimal performance. This saturation process typically takes 24–48 hours. 4. A check valve and bubble counter must be installed before use. These components are not included and must be provided by the user. 5. The external atomizer may produce a slight "squeaking" sound during use. This is normal and caused by CO2 gas atomization. Note: If the pressure regulator includes a check valve function, an additional check valve is still required to prevent water backflow. Installation Steps: 1. Tighten the upper and lower shells by hand only. Do not use excessive force or tools. 2. Avoid over-tightening the air pipe locking nut to prevent damage. A light secure fit is sufficient.