<p><b>Specification:</b></p> <p>Model:CB-Q9 1W length:105mm diameter:105mm </p> <p>      CB-Q12 1.2W length:125mm diameter:125mm</p> <p>      Color:white/blue/pink/green/colorful</p> <p><b>Instruction:</b></p> <p>1:Connect the air stone to the airline tubing and the airline tubing to the air pump（not included）.</p> <p>2:Use the suction cups to secure the LED fixture to the bottom of aquarium and cover it with gravel.</p> <p>3:Connect the plug to a GFCI outlet and create a drip loop to prevent water from traveling along the cord and contacting the plug.</p> <p><b>Note:</b> this air bubble stone need to work with a air pump, (air pump NOT included,you can easily find and order on Amazon</p> <p><b>Safety & friendly</b></p> <p>Low voltage design, energy saving with low heat, no harm to baby fishes</p>