Tunze Wavebox Extension, 6215.500. **** PRODUCT MANUAL **** Includes Magnet Holders. In case of aquariums with volumes of over 1,200 litres (317 US gal.), a Wavebox Extension 6212.50 should be added to the existing Wavebox. The Wavebox Extension contains the Wavebox 6212, however without Wavecontroller 6091. The combination of Wavebox and Wavebox Extension is suitable for aquariums up to about 2,400 litres (abt. 634 US gal.). Each additional extension (three maximum) increases the volume recommended by about 1,200 litres (abt. 317 US gal.). The Waveboxes can be placed next to each other or opposite each other. A Wavebox Extension can be connected without any other accessories. A Y adapter 7092.34 is required only for two or three Wavebox extensions. Wavebox extension (6212.500) * Dimensions: L125 x W113 x H300 mm (L4.9 x W4.4 x H11.8 in.) * Immersion depth: approx. 280 mm (11 in.) * 30 W, 230 V / 50-60 Hz (115 V / 50-60 Hz) on average