Betta Air Action Exploring Diver is a bright colourful and fun ornament which will be very appealing to children’s tanks. It could be placed anywhere in the aquarium to depict someone who is exploring a reef or searching for treasure ! A small air pump such as a Betta AP-2000 will be sufficient enough to get the bubbles streaming out. Approximate dimensions 9cm (l) x 10cm (w) x 10cm (h).