I am only familiar with two kinds of wave boxes (well I have one kind and read about the other); the Tunze and the wave2k. I have the wave2k, but I wouldn't recommend it really. Don't get me wrong, the flow it puts out is incredible, but there are some drawbacks. For one it is very large, with the bulk of that size sitting in your tank. It is also loud and has some limitations on how it can be setup (the motor hangs on the outside of the tank). I haven't read anything bad about the tunze, except the price that is.