Easy to install, suitable for Volcano replacement lamps, freshwater aquariums, saltwater aquariums, desktop aquariums, hydroponic aquariums, ponds, aquarium decorations. Air stone for aquarium oxygen / aeration, the round discs can keep stable at the bottom of your aquarium, and produce more small air bubbles which could add dissolved oxygen level, keep your fish alive and alive. The aquarium air bubble stone is made of non-toxic mineral material, high temperature sintered, safe, durable, washable, it is safe to use in your aquarium. For the first time use, we recommend that you wash it with tap water and wash it with tank water for 1-2 hours. The light of air bubbles does not generate itself, it should be used with the air pump (not included). Changing LEDs, excellent night light for superb night vision. Color: white / blue / pink / green / colorful. Instructions : Connect the air stone to the overhead line tube and the overhead line tube to the air pump (not included). Use the suction cups to secure the LED light to the bottom of the aquarium and cover it with gravel. Connect the plug to a GFCI outlet and create a drip loop to prevent water from flowing along the cord and coming into contact with the outlet.