Originally Posted by mr_X
ahh..very smart of them to put a proprietary plug on them.
Yeah... but not very smart of them to bring out their new Evolution line and call it "controllable". They end up muddying their own water with their other "controllable" line of product.
Just for clarification, there are three "flavors" of Koralia out there...
1. Old version, 120V Koralia - just plug them in the wall and they work. If you plan on turning them on and off often to simulate waves, expect them to break within 6 months. Fortunately, these are going off the market, replaced by the "Evolution" series.
2. New version, 120V Koralia - these are called the "Evolution" series. A little more flow than the old version, but the better thing is that it can be turned on/off over and over and over again... and they won't break. So these are "controllable", as far as being able to use them with a wavemaker, or a aquarium controller system. But you can only turn them on or off... not vary the flow.
3. Older version, but not as old as #1, 12V Korlia - these are the "controllable" ones that require the Hydor control unit. The powerheads have a special plug in that does NOT plug in to the wall, but instead plugs in to the Hydro controller. The benefit of these is that you can control the speed of the powerhead and get more variable control.