Help my flow

[aquaferg]

I have a 55g with one long structure in the middle of the tank. I have Koralia 3 and 4 on each side the 3 is on the right pointing at a 45 degree angle towards the back and the 4 is on the left pointing at a 45 degree angle towards the front. I am getting debris in each corner due to lack of flow. Any one have any suggestions? Here is a pic of the setup...

 

[nordy]

Your tank is so, so, so....clean!

Here's a pic of my tank. You can see my Koralias-2 #2's and 2 nanos. I have the big ones pointing to the front (long) side of the tank and the nanos are acting as supplemental circulators. My canister filter and sump return are in the far right hand back corner and also provide circulation. I made a lot od adjustments to pump positions to make sure all the corals get decent, but not too much, flow. I think it helps to have the big ones point to the front of the tank as it helps disperse the flow over a wide area, but in a gentle manner.
I would suggest moving your pumps around and trying pointing them directly at the front of the tank and see how that affects your low flow areas. It seems like the combined flow of a 3 and a 4 should be able to be arranged to get at least some flow to your corners.

 

[aquaferg]

Mine looked as "bad"as your did until I re-scaped it to one large structure instead of two smaller ones. I had a lot of sand suspended in my water column. But you are right with a #1 & a #2 you would think there would be sufficient flow to cover the whole tank.

 

[michaeltx]

most have found that even with the koralia powerheads they still had a dead spot in the back behind the rocks. the easy fix for this is adding another small directional powerhead behind the rocks to increase flow in that area.
Mike