Jan 26, 2012 #1 W WesMeeks Active Member View Badges Joined Jul 23, 2011 Messages 195 Reaction score 0 Location Chattanooga Rating - 0% 0 0 0 What GPH should I be using on a 55 gallon reef tank?
Jan 27, 2012 #2 Conrad Community Member View Badges Joined Jan 12, 2012 Messages 34 Reaction score 15 Location Milwaukee, WI Rating - 0% 0 0 0 600gph
Jan 27, 2012 #3 E Eggs Well-Known Member View Badges West Palm Beach Reefer Midwest Reefer Joined Aug 15, 2009 Messages 870 Reaction score 508 Location South Florida Rating - 0% 0 0 0 It will depend on your overflows gph. Anyway, I run two tanks at 5x through the sump.