Is there anyway to turn down the internal pump? I had a marineland portrait that had a outlet like that for the filter and I could turn it down and it helped. Or you could always try and put a plant in front of it, or try and turn the nozzle up towards the surface more. I've never seen it right in the middle of the tank like that.
So you could put a piece of foam on the power head thing to baffle
Or, a tall piece of driftwood strategically placed in front of it.
Fisheye beat me too it.
I was also going to say foam and a big rock instead of the wood.
Foam is an amazing thing hahaha
Good ideas above. In my Daughters betta tank I used a cut piece of foam from an AquaClear to baffle the filter.
Somewhat unrelated... But is that a Java Fern in the back corner of the tank?