GloFish LED Bubbler. Beautiful underwater lighting effects are created with the blue LEDs, while bubbles improve the circulation and oxygenation of the water. This disc-shaped bubbler features 6 blue LED lights that highlight the fluorescent colors of GloFish and create beautiful underwater lighting effects. A bubbling feature helps improve the circulation and oxygenation of your aquarium water (air pump, airline tubing and check valve are sold separately). Fits any fish tank. 6 blue LED lights to highlight fish, decorations, and plants Bubbling feature improves circulation and oxygenation of water Fits inside any aquarium Air pump, tubing, and check valve sold separately Size: 3" x 3"