With the CO2 regulator, you can adjust the amount of CO2 initially accurately and safely The bubble counter with thickened acrylic tube has improved corrosion resistance and longer service life, and plants can be optimally supplied with CO2 and push beautifully The 2 displays allow you to read the parameters and you can assure if they are as you wish Be made of high quality aluminum alloy. The simple design not only makes installation easy, but also makes your aquarium more beautiful The CO2 regulator can be used with our wall mounted timer to make automatic time delay switch