Getting Good Flow on Rock

Random Aquarist

New member
I'd like to grow a colony of Acropora on this rock (left), but I can't get good flow by it. The powerhead near it is an Aquaclear 400 and the other powerhead is a Tunze Stream 6100. Can someone offer any suggestions?

PowerheadPositions.jpg
 
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And, yes, I know I could put the Aquaclear on the back wall and aim it along the rock, but that would just look way too distracting.
 
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