Pump Placement

[ncny21802]

I have 2 Tunze 6000s on my 120. It is 60 inches long. The tank is reef ready and the overflows are in both back corners. Where should I place the pumps so my DSB doesn't get pushed around in the middle like it is. Right now I have one to the left of the right overflow if you are looking at the tank and one to the right of the left overflow facing the middle of the tank. I have a Vortech placed 6 inches above the DSB for dead spots but that doesn't move the sand as I have it on low. I am running the pumps on the pulse mode one starting at 10% going to 100% and the other starting at 30% going to 80% every 3 seconds. The middle of the tank by the front glass gets pushed towards the back. Is there anything I can do to improve this?

http://i80.photobucket.com/albums/j161/ncny21802/DSCF0392.jpg

This is the only pic that I could find on my site. You can kinda see the area I am talking about

http://i80.photobucket.com/albums/j161/ncny21802/DSCF0367.jpg

This is an old pic but is the only full tank I have in my gallery. A few things have change as far as rocks being added but it gives you an idea of the tank. The area in questions is to the left of the rock that is in the middle of the tank

 

[ncny21802]

In the second pic you can a SEIO 1500 in the upper right corner. That is where 1 of the Tunzees is now. The other is on the opposite side of the tank on the left of the overflow closer to the front of the tank

 

[rvitko]

You could try putting some coarser sand on top or turning down the pumps or changing the direction from corner to opposite diagonal corner and use interval 1 so only one pump is running at a time.