1、Aluminum Alloy Material: Fish tank CO₂ refiner is made of high quality aluminum alloy as a whole, and the surface is nickel plated and will never rust. 2、Prevent Slipping: The surface of the CO₂ refining machine has a knurled design, which has a good anti slip effect, and can be easily opened to clean and replace the refiner. 3、Efficient: The squarium mini CO₂ refiner is clean and tidy. After entering the water, it complements the aquatic plants and has a good refining effect. 4、Scope of Application: The fish tank CO₂ refining machine has a U shaped design, suitable for aquatic plants, fish tanks, aquariums, etc. 5、Note: When the refiner is used in water, there will be large bubbles at the beginning of use, and it will be normal after a few hours of use.