Jacob,
I can't help with this except to tell you I will find out soon. In March, I will be adding two MP40's and a Tunze Wavebox to my 280g. I did however, get some good advice yesterday from John @ Kingfish. He said that to reduce the friction from the water movement, have the vortechs on the same side to create circular motion in the tank instead of having them work towards each other. I will see soon...

Steve