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Wavebox 6212 - near-nature water movement Tunze Wavebox 6212 is a wave generator for aquariums from 52 to 317 US Gal. It is especially suitable for reef biotopes as it generates an oscilating current. The current corresponds exactly to the wave structure and water movement in reef top zones. The Wavebox applies this oscillating principle through Wave Controller 6091, which uses the intrinsic resonance of the tank. A very low power consumption generates ideal water movement. The water is in movement in all areas of the aquarium, even the smallest section behind a decoration benefits from the wash. Oscillating current with near nature wave movement and circulation De-sedimentation of the entire aquarium habitat; nature water movement fish and corals is product Wave generation at low power comsumpton Supplements existing circulation pumps Little space required> Dimensions: L 4.9 in x W 4.4 in x H 11.8 in For tanks from 52 to 317 US Gal For larger tanks, an additional Wavebox extension (without Wave Controller) can be used to extend the system 

 If you are looking for natural REAL waves in your tank this is by far the BEST

We use them in our 180 gallon reef tank and it's creates a natural back and forth motion which is as close as you can get to the real thing