The diffusion plate decomposes the CO2 in lowercase bubbles, then the CO2 can easily dissolve in the water allowing the plants to absorb the CO2 for photosynthesis the steel diffuser stainless is solid and durable, hard to break, and non-toxic for your animals and plants Ceramic disk is replaceable, it is easy to remove and replace, and please tighten when you install it Suitable for aquariums up to 18 mm wall thickness The total length of 29 cm. The ceramic disc has a diameter of 36 mm, the CO2 diffuser is suitable for standard CO2 air tubes of 4 * 6 mm (inside diameter 4 mm and 6 mm outside diameter) it is absolutely imperative for Aquatic plants to guarantee a sufficient CO2 intake within the aquarium, as CO2 provides them with the carbon indispensable to their survival. The CO2 diffuser delivers CO2 in sufficient quantity for aquariums. Decrease of CO2 losses Fine bubbles, easy cleaning greatly promote the photosynthesis of plants High quality stainless steel and advanced ceramic