Description With the bubble counter, you can adjust the amount of initially accurately and safelyThe bubble counter with thickened acrylic tube has improved corrosion resistance and longer service life, and plants can be optimally supplied with and push beautifully The 2 screens allow you to read the parameters and you can assure if they are the way you want Being made of high quality aluminum alloy. Not only the simple design makes the installation easy, but also it makes your aquarium more beautiful The controller can be used with our wall mounted timer to make an automatic time delay switch Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days. Thank you for choosing our product. We hope you enjoy it