i just upgraded from a 46 bowfront to a 90gal. Is there a thing as too much flow, i may have gone a little over board got a mag 9.5 return, 2 koralias 3 cross streaming top to bottom, and 2 koralias nanos blowing staight across 4 inches from bottom to keep sand clear. http://i279.photobucket.com/albums/k...21-2010048.jpg
I run a mag 12 on my 90gal with two K 3's crossing. Flow will be fine. Been running mine that way for at least 2 or 3 years out of the 5 its been setup for.
I run a mag 9.5 return with two 3/4 locline returns and two Koralia 3's blowing cross. Things in there seem to love it. Coral opens within minutes of being acclimated. The Tang has a blast in the cross currents. Stuff doesn't just rest on the sand.