Noob question:

[globaldesigns]

I run:
- 2 Vortech MP40W's
- 2 #4 Koralia's with wavemaker controller
- Mag 18 return pump

All them together are equal to 11,000 Gallons per hour of momement, give or take. Of course there is a little loss from head room of the return pump... As others stated it depends on what coral you have, but I will put something out there... Remember the wild is not a gentle place, nor is it really calm, if you go scuba or snorkling do you see dietrus and crap on the rocks? I don't, so I believe the more movement of water the better.

Have fun!