High quality Made of high quality materials, non-toxic, safe, energy-saving and durable, for long-term use. Safe nut lock system design can lock effectively the CO2 pipe and the water pipe to prevent loosening. Decorative Poster for Aquarium. Environmentally friendly Using reserve penetration technology to diffuse CO2 can increase the dissolution effect and save the use of CO2, which is more environmentally friendly. Installation steps Tighten the upper and lower shells with both hands, do not use brute force or hardware tools such as wrenches to operate; Do not overtighten the air pipe lock nut, otherwise the air pipe will be damaged. Just a little tension. High quality Made of high quality materials, non-toxic, safe, energy-saving and durable, for long-term use. Safe nut locking system design can effectively lock the CO2 pipe and the water pipe to prevent loosening. Good atomization effectReverse osmosis atomization tube, lower pressure requirement, finer atomization effect, only need pressure above 0.15MPa to squeeze out the air. The use of a tubular atomization core provides greater atomization coverage area compared to traditional cores. Note: The data is all measured manually, please allow 1-3cm error due to differences in light and display, there may be color differences, please refer to the actual item received .