Power Heads

[cre]

Is it possible to have to much movement in your tank? I have two power heads that are are rated for 30 gallon tanks. My tanks is a 72 gallon. Both power heads are in the right corner of the tank pointed along the back wall towards the filter intake...

 

[azonic]

I'm pretty sure you CAN get too much movement in your tank. There's only so much current that fish and corals can tolerate but your powerheads shouldnt cause too much for your 72 if there rated for a 60 gallon tank combined.