I'll try getting in along the rocks with some cleaning equipment and see if it needs adjustment.
I have a hob filter, and 2 aquaclear 50 powerheads in there. Total flow is just under 700 gph according to manufacturer specs. It's only a 46 bowfront, Maybe too much flow?
I'm planning to change out the aquaclear powerheads for something better, and use the aquaclears for salt mixing.