Suggested loc line angles for 3 foot lagoon

[Clueless_Reefer]

Hi Friends!
I was hoping to get some suggestions on angling my loc lines for this 3x3 foot (12 inch deep) lagoon tank. I keep running into issues with there being dead spots towards the front...
-Picture below on how I put them today...it doesn't seem AS bad but previously I had them angling both corners... and it would make a dead spot in the middle.

 

[Onewolf]

What direction are your powerheads pointing?

 

[Clueless_Reefer]

Currently I only have one in the back right (arrow on right side). My thought was to save up and get two mp10's and put them in that back area which I've highlighted with bubbles. In case it was difficult to see, I put rectangles where the current loc lines are pointed.