I have 4 MP40s on my 180. 2 on each end. I run them on long pulse mode, full blast. I try to vary the length of the pulses on each of the pumps so they are as random as possible. I don't use any of the sync modes at all. These pumps really stir things up.
I also have 7 Tunze Nano streams across the back wall. All are modded, so flow is way more than stock.
4 6025s
1 6045
2 6055s on a multi controller
Throw in two 3/4 inch sea swirls on the returns and my tank is a flow junkie's dream come true. I am also looking at another 2 6055s to hang on the multi controller.
Herb