Return Flow

+1 on the sea swirl... have you thought about rotating thr flow in the tank instead. maybe using a couple vortechs?
 
I already have an MP20. The reason I asked is because I am planning on re-plumping the return pipes so that they are close to the bottom of the tank behind the rock work. I figured it would be better to have alternating flow vs a sharp beam of water.
 
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