Penn-Plax Bubble-Wall Air Diffusers for Aquariums produce a spectacular wall of bubbles in any aquarium. These diffusers create a dramatic mist of healthful bubbles along the entire length. Simply connect your air pump (not included) and the Bubble-Wall will evenly distribute fine bubbles through a super-porous, non-clogging wand. The tough polycyl material stands up to continual use. Additional Bubble-Wall diffusers can be joined using the enclosed connector to create almost any length and each can be cut with a razor blade to divide or shorten. SPECTACULAR WALL OF BUBBLES: the diffuser creates a dramatic mist of healthy, aerating bubbles.|SUPER POUROUS WAND: connect the wand to your air pump (not included) for an even distribution of bubbles.|CONNECTOR INCLUDED: to allow you to create any length of bubble wall by connecting this wall to other Penn Plax bubble walls (sold separately).