where to put next koralia?

[Byron]

I feel like i need more flow in my 20 gallon tank so I am adding another power head. I have a koralia 1 right now in the upper left corner in front of the overflow box. My return is in the upper right (hard to see in the picture). Where should i put my next powerhead?

 

*excuse the crappy looking aquarium I'm in the process of a re-scape

 

[beeker]

probably about the same height as the first one just on the other side, i have my koralia 2's almost facing each other on opposite side and notice a great amount of flow, plus both hitting off each other creates nice random current, i'd try it like that, you can always move it around if the placement isn't just right