My set up is a 20L, with 2 maxijet 600's. I have about 20-25 lbs live rock, pretty much set up in a wall going left to right in my tank. The problem with this is that it separates my tank in to a front and rear section. I originally had my ph set up with one in the back left...aiming towards the front center, and the other one on the back right...aiming towards the back left so there isn't a dead spot in the back. After doing some reading, I noticed that it wasn't ideal to have this circular motion, but to have more of a random effect. How would you suggest that I set up my ph's so that I can get more of a random effect without a whole dead spot in the back of my tank? Or am I screwed because of my LR arrangement? I tried them both in the back corners aiming towards front center. The front had some nice current my clowns started to play in, but the rear was definitely a dead spot. Any suggestions would be greatly appreciated!