Easy to install, suitable for volcano replacement lights, freshwater aquariums, saltwater aquariums, stationary aquariums, hydroponic aquariums, ponds, aquarium decorations. Air stone for aquarium oxygen/aeration, the round discs can stay stable at the bottom of your aquarium and produce more small air bubbles that can supply dissolved oxygen, keep your fish alive and lively. 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, we recommend that you wash it with tap water and wash it with water from the tank for 1-2 hours. The light does not generate air bubbles by itself. it must also be used with the air pump (not included). Replace LEDs, good night light for good night vision. Color: White/Blue/Pink/Green/Colorful. Instructions: Connect the air stone to the air line hose and the air line hose to the air pump (not included). Use the suction cups to attach the LED lamp to the bottom of the aquarium and cover it with gravel. Connect the outlet to a GFCI outlet and create a drip loop to prevent water from running down the cord and contacting the outlet.