Flow between Overflows

[Jerid]

I currently have a 72” wide tank with 2 overflows on the back. I would like to do a GSP wall in between them but I’m not sure if the flow is enough. Would adding a small gyre back there help make enough flow to keep them satisfied?

 

[monkeyCmonkeyDo]

Gsp will grow in moderate to light flow.
D

 

[Jerid]

Gsp will grow in moderate to light flow.
D

I’ll save the money then. Thanks