Description Product description Size: S: 40-60CM M: 80-100CM L: 120-150CM Color: transparent Material: Acrylic Package content: 1pcs carbon dioxide refiner 1.What is it for It is a CO2 diffuser that helps to atomize the carbon dioxide and accelerate the assimilation of CO2 into water. Animals and plants can therefore photosynthesize better and grow vigorously. 2.Easy to use and install All you need to do is connect it to your fish scanners drain hose and attach it next to the tank. 3.Excellent Dissolution Rates This device delivers tiny carbon dioxide bubbles that dissolve very well and very quickly in water. It is favorable that the flora and fauna system in the aquarium grow. 4.Bubble counter function No additional bubble counter is required, 2-in-1 design so that the CO2 volume can be easily assessed. 5.High Quality The main body is made of imported acrylic material, and the product is translucent like crystals. The thinning sheet is made of excellent nano-MBKT technology, which achieves better thinning effect.