The diffuser plate decomposes the CO2 into tiny streams of bubbles, then the CO2 can easily dissolve in the water thus allowing the plants to absorb the CO2 for photosynthesis The stainless steel diffuser is strong and durable, difficult breakable, and non-toxic to your pets and plants Ceramic disc is replaceable, it is easy to remove and replace, and please tighten when you install it Suitable for aquariums up to 18 mm in diameter wall thickness The total length of the J-Pipe is 40 cm. The ceramic disc is 36mm in diameter, the CO2 diffuser is suitable for standard 4*6mm CO2 air tubes (inner diameter 4mm and outer diameter 6mm) CO2 escapes from the diffuser plate in the form of tiny CO2 bubbles which allows CO2 to easily dissolve in water, so that plants can absorb CO2 faster and carry out photosynthesis efficiently, thus reduce the waste of CO2 gas. NICREW CO2 Diffuser It is absolutely imperative for aquatic plants to ensure a sufficient supply of CO2 within the aquarium, as CO2 provides them with the carbon essential for their survival. The CO2 diffuser delivers enough CO2 for aquariums. Reduced CO2 loss Fine bubbles, easy cleaning Greatly promote plant photosynthesis High quality stainless steel and state-of-the-art ceramic technology Tips: We draw your attention to the fact that the diffusion plate needs to start up that the accumulated CO2 bubbles exert a certain initial pressure more CO2 is therefore released into the aquarium on start-up. Wait until this effect stops, without increasing the amount of bubbles otherwise you will have to decrease the amount of bubbles again afterwards. Check the CO2 level in the aquarium using a permanent CO2 test system. Adjust the amount of CO2 in the aquarium by increasing or decreasing the number of CO2 bubbles. The diffuser ceramic disc is consumable. The lifespan varies depending on the type and growth rate of algae in the aquarium. The maintenance period is generally 7 to 60 days. If there is more algae growing on the ceramic disc, the bubble diffuser will not produce outside CO2 or the bubbles get bigger, you can soak it in 84 disinfectant for one night (the supermarket sells very cheap ). Product size: 40 cm Product quantity: 1 Product color: silver