Under Gravel Filter, designed specifically for efficient undergravel filtration in fish tanks with the aid of an air pump. Experience the benefits of circulating the water beneath the gravel layer, effectively minimizing gravel contamination. The generous surface area provided by the gravel bed creates an ideal environment for Nitrobacteria, ensuring crystal clear water in your tank. Enhance the filtration process with our versatile filter plate, compatible with various equipment such as air pumps, filter pumps, submersible power heads, and hang-on filters. The adjustable lift tube offers flexibility, enabling you to customize the desired height according to your preference. With its noise-reducing design, the tube head operates silently, ensuring a peaceful aquatic environment. Rest assured that our air stones will remain secure without the risk of clogging or collapsing. This Under Gravel Filter is suitable for both freshwater and saltwater tanks. Installation is a breeze! Simply cover the tank bottom entirely with the filter plate and trim any excess parts. Each plate can be seamlessly connected to a tube, promoting efficient water flow. Place the gravel bed atop the filter plate, and for added aeration, air stones can be incorporated within the tube. Finally, add water to your tank and enjoy the benefits of our Under Gravel Filter, included as one unit with dimensions of 19.9x14cm (7.8"x5.5"). Experience the optimal filtration and a healthier aquatic environment for your fish.