| Ok, here is what I have in my 65. I have 2 Aqua Clear 70's and 2 Seio M1400's. That is way too much flow if they are runnuing continous. What I do is back the Seios down to about half the flow they can output. I leave one Seio running all of the time and the other alternates ON/Off every hour.
The other two powerheads alternate on and off in a random patern between 20 and 60 minutes. | 
