First off let my say that the Tunze streams, if you buy one you WILL want another and also take in to consideration that they use almost no power. That being said, I would place it either in a back corner diagonally hitting the front glass panel, or side mount it, allowing it's wide sweep to try to cover the whole tank. But again, just do the two streams and ditch all those maxi's and your electricity bill and tank will thank you.