Bubble Wands create a beautiful decorative effect. A curtain of bubbles at the rear of your aquarium improves water circulation and oxygen exchange at the surface. Large suction cups hold tightly to glass or can function as an anchor when wands are installed in the gravel bed. Available in four different sizes. There is also a Bubble Wand Kit complete with three 8" wands and fittings...the installation options are endless. Includes anti-siphon valve.