Powerhead Question

[mindy2577]

I have a 44 pentagon tank. I have one Koralia 3 powerhead. Should I purchase another one? With my tank being really deep, I was thinking that maybe I should put one up top and another on the opposite side more towards the middle. But would this be too much?
Thanks!!

 

[lil.guppy]

I have a #4 on the left side and a penguin 1140 powerhead with the rotating head on the right side.
I have good flow going right now. I think it depends on what you want in your tank. #3 is not that bad, but it would probably help if you got another 3 or some kind of powerhead for the other side of your tank.