I am struggling to establish a good flow in my softie only tank. My tank is 500 gallons (97" x 49" x 20") and I am pushing roughly 7000-7500 gph of flow through the tank. The flow looks good along the outside of the tank but it looks pretty heavy in the center and I'm not sure why. I have a large Kenya tree that doesn't mind the high flow, and a very large Xenia colony (couple thousand polyps if I had to guess), both in the center of the tank. The Xenia colony will get hit randomly by a huge burst of flow that will make most of the polyps close. Any idea how I can fix the flow?