Dymax’s Crystal Glass Lily Pipes are perfect for planted tanks. Crafted from high-quality quartz glass, these aquarium lily pipes provide a clean look along with beautiful clarity that is scratch resistant. These glass lily pipes can be used in both planted aquarium tanks and can also be utilized in saltwater reefs, coral and marine aquarium setups. Setup is simple and straightforward for anyone who does not want their aquarium filtration equipment to distract from the view of the aquascape layout within the aquarium. Dymax’s Crystal Glass Lily Pipe set comes with both the inflow and outflow pipes and is available in two different sizes to fit a range of aquarium sizes. These glass lily pipes will help provide consistent flow to all areas of an aquarium and prevent stagnant areas, also ensuring proper aeration and ideal water flow for aquatic plant growth.