29x29x20 tank flow..suggestion.

[moga]

i have 29x29x20 cube tank..

I have some concerns about Zoos that all gone because of the flow..

Currently i have 2 Koralia 4 and 1 tunze 6050...

should I put the pump at the side? instead of back of the tank?

you can see the front tank with some sand slope built because of the flow..

http://members.cox.net/pateggle/aq1.JPG

http://members.cox.net/pateggle/aq3.JPG

http://members.cox.net/pateggle/aq4.JPG

http://members.cox.net/pateggle/aq5.JPG

http://members.cox.net/pateggle/aq8.JPG

http://members.cox.net/pateggle/aq10.JPG


let me know~