Placement of Wavemaker MP40 x 2

[Talhamalik9]

Hi all. Just set up a RSR 300 XL.
I have tried to make a floating aquascape using acrylic rods below a large plate.
The aquascape is in front of the weir box (1-2” in front of it)

I have one mp40 on the side at the front and high.
Another on the opposite side at the back and low. Issue is the aquascape gets in the way.

See pic please and advise on placement!!

 

[Talhamalik9]

 

[vetteguy53081]

How you have it placed is ideal and creates a semi-gyre effect

 

[Talhamalik9]

Is it ok that the rock blocks the flow?
Also anything above 20% seems to displace my sand. Is 20% sufficient for a 90cm tank?

 

[Talhamalik9]

Would the one lower down be better placed on the back wall?