Dead spot in tank

[Tate]

I have two 800 gph powerheads on my 90 gallon tank and currently have them 1/3 down the tank pointed at each other and the return shooting in the middle of those. I have a dead spot in the right corner of my tank. How would I change the placement but not too much because I like how they are now

 

[kdpuffer]

I would suggest adding another powerhead. You could even run it on a timer to create more random flow.