Possible Flow issues

[Carpman]

I May have some flow issue's in my Trigon 190, I currently have it set up like this

Using Eheim 4+ 350 and a koralia nano 2200 giving approx 3000ltr per hr.
I'm trying to push flow over the surface down the front and back across soil to the outlet, but I'm only getting a little movement at soil level.

My options are add additional powerhead/replace for a more powerful head, or change direction completely?
I went for the above direction because of scape, help keep soil pushing towards the back/corner of the tank.

 

[alto]

Is the inlet clear of any rock obstruction?
That should be providing water movement at the substrate zone

You don’t need racing stream effects at the substrate - slow steady flow works just fine

What happens when you add fish food - I like a cube of frozen daphnia ... if it goes everywhere, it’s a good indication that CO2 is also dispersing everywhere

 

[alto]

with that T and elbows, do you really have improved flow?