If this is a 135 gallon tank then the 2 koralia pumps are way to small but great for spot flow. You need good high end pumps with flow control knobs and duckbill tips for dirrection control.
Look here.GL
http://www.advancedaquarist.com/2007/1/aafeature/view
http://saltaquarium.about.com/od/sta...opmistakes.htm