Need some flow advice

[GR00VY]

I have a dead spot in one side of my tank and I can’t figure a way to get water moving there.
The picture I am attaching is very bad so I apologize. The box on the left of the tank is my hob. Arrows represent my 2 power heads and which way they are pushing water. Xs represent where I am getting green algae on sand that I have to keep removing. Any advice on how to get some flow behind this rock?

 

[GR00VY]

The power head under the hob filter is mid level on tank and pointing straight. The power head on the right is at the top 1/3 of the tank and slightly angled up.

 

[GR00VY]

Here is a picture of the tank. The jet on the left is toward the back of the tank and the one one right of tank is toward the front of the tank.
The one the left aims down the back of my tank. When the currents hits the back wall it kinda tumbled there. That is why I get algae build on the sand behind the rock between the glass and the rock and on the sand in the right side of the tank. The Powerhead on the right isn’t close enough to the back to pull the current and blast it to the front of the rank. The problem is, if I move closer to the back so it can catch the incoming current, it won’t produce a good flow at the front of the tank.
Should I get a stronger unit or just get another one? I just don’t want my tank cluttered up crap more than it is already.

 

[GR00VY]

Here is the tank.

 

[Bbfishb81]

Try pointing the power towards the bottom a little instead of straight across. See if that helps.