I'm running a seio 1500 on one end of my 4' 120g, and i have ~500gph coming back from my sump flowing across the tank.
I would like to down the road get more powerheads to distribute my waterflow.
Advanced aquarist found that bleached corals have a higher chance of recovering when kept in higher water flow, and that they grow faster in too high of flow than too low of flow.
link here:
http://www.advancedaquarist.com/2006/8/aafeature
I have to vouch for that. I accidentally bleached two toadstool frags (Albert was right lol
), and when I moved them to very high flow areas, they returned almost overnight.
Learn as you go...