what are the benefits of running the intake all the way across the tank? i'm only seeing about 4inches of holes, and several feet of pipe. Why not just have the intake at the bottom on the same side where it comes in...
the flaw in the "waterfall" style hob filter is that the intake only picks up the water that was dropped. as the water comes out of the top of the filter and drops straight down, a lot of that clean water goes right back into the intake tube. so you only get a good cycle directly in front of your filter. by moving the intake off to the side, you allow the filter to grab water from the one side of the tank and drop it on the other allowing for better filtration and water circulation by creating a larger cycle area.
I hook up AquaClear 110's to homemade pvc undergravel filters. Sucks in debris from all sections of the tank.