Suitable for filter tubes: 16mm internal; 22mm external. Suitable for aquariums up to 500L Simple installation: to be connected with the hose of the external filter Equipped with ceramic tubular atomizing core, which can produce finer CO2 bubbles to ensure plants absorb the right amount of CO2 and also save CO2 consumption This product uses high-quality materials and has a durable and crack-resistant metal body, which is non-toxic, safe, energy-saving and environmentally friendly The safety nut locking system design can effectively lock the CO2 pipe and water pipe to prevent leakage. Be careful not to overtighten it, otherwise the air hose will be damaged CO2 Atomizer Diffuser This product can make CO2 gas more uniform and quickly decompose in water, so that it stays in water longer, which can allow plants to observe it better and carry out photosynthesis to generate carbohydrates, butif the efficiency is not high, the production of carbohydrates will not meet the minimum requirements of aquatic plant respiration, and the growth of aquatic plants will be difficult or slow. Material: metal + acrylic Interface: 16/22mm Package weight: 151g The product must be installed with a check valve and a bubble recorder before it can be used (both must be prepared by the user). The atomizer uses a precise ceramic atomization tube, which must be completely saturated with water to achieve a good atomization effect. This duration usually takes between 24 and 48 hours. When leaving the factory, the atomizer is not tight and must be tightened by the customer. Do not use hardware tools such as wrenches to install or disassemble the product to avoid damaging the product. Do not overtighten the air hose lock nut or the air hose will be damaged. The external atomizer will emit a slight squeak during use. This is not a leak, but the sound of CO2 gas after atomization.