Changing Powerhead Placement

i have been wanting to change up the flow in my tank and switch up the circulation. I have some low flow areas with cyno, which is undesirable.
This is a picture of my tank




I have a Rio 6hf for my return (which has a Hydor Flo - rotating nozzle) on it. A K2 and two K1s. What would be the best placement/setup with my rock work?
I was thinking of just using both of the K1s and placing them both on the back wall blowing towards the front glass, the right one pointing down and to the center of the tank and the left one pointing up and toward the center of the tank. Like in this pic:

I dont know if i need the K2 or not but i dont know where to place it?
Right now it is connected to the lower/center right side glass all the way back, shooting left behind the rock work pretty straight?
Any ideas?

 

I would say back right, pointed slightly down and in is a good option.

 

any others want to jump in?

 

one on the back and one on the side would do wonders like back right and then one on the left side

 

should i use all three pumps? the 2 K1's and the K2?

 

'bump:

 

crusty

my opinion is your tank looks beautiful
I cant see the cyno?

the only thing I would change would be to angle one of those power heads upwards a bit as the surface seems a bit calm

the water then will be pushed along surface bounce of the side or the front and disperse more evenly through the tank - this way you avoid having any corals directly in the flow path

and if you angle the power head to bounce of the area above where the cyno does appear, IME that will help prevent it

Steve

 

you can always add another one for more flow where you want and keep the existing ones where they are if you like them there.