Ok this is a problem easily fixed. I just rearranged my rocks in my 50 gallon tank so that I can fit SPS corals at the top eventually, and keep my current soft corals at the bottom. I wish I had the space on the floor of the tank to make a L or U shaped lagoon, even a central rock pile would be nice. But the small floorplan of my tank restricts my choices (my tank is a tall tank). I have 75-85 lbs of live rock. So I created a bleacher style tank with only like 2 inches of water space on the back wall. My previous arrangement of rocks, with just one 300 gph powerhead aiming at the top of the water along with another small powerhead facing sorta downward on the vertical middle of the left side of the tank, provided enough flow to keep all my polyps and zooanthids to sway nice and smoothly in the current. Now with my new rock configuration It wasnt working, so I pointed my small powerhead behind the back of the rocks to keep that water from standing still, and the corals in the front of the tank still had dead spots. I bought another 300 gph powerhead and put it in the opposite corner of the tank as the other and pointed it at the other one, so one would aim from the back left side of the tank to the back right side of the tank, and the other would flow from the front left side of the tank to the front right side of the tank. The flow is barly moving the once dead spots and I would like to figure out a way to arrange my rocks and powerheads to create optimal flow, please help! Thanks a ton, Kudos