Power heads for a 120 mix reef

[brad ellington]

I have a 120. 4-2-2 mix reef
I want to upgrade power heads Should I go with 2 mp10 or one mp40

 

[GroktheCube]

What do you have for flow otherwise?

If you don't have other PHs, I'm not sure one MP40 would be enough to avoid dead spots.

 

[brad ellington]

i have 4 Hydor Koralia Evolution 1400GPH and a Koralia Nano my goal is to take all all the hydor out and use them in my two 40b frag tanks and get something better for the display tank.
i am using a 4 way controller and a reef keeper to control the power heads