Do the two gyre on the back wall and the mp low for turbulent times. Use your controller to turn them on and off randomly. I have the old gyre but all the parts have been upgraded via warranty. Very happy with the current state of it. Reliability was questionable for 1st gen. Great now. The new mp vortech pumps are really quiet and more powerful than before. By quiet I mean "is that thing on quiet". The new gyre are nice and quiet too, you know how fussy I am about the noise.