Return Pump - How Much is Too Much? I am in the process of upgrading my return pump from my sump. I have a 55g reef/fish tank. I am replacing a 750gph return pump with a 1200 gph pump and adding a second overflow box. Is this overkill because it looks somewhat harsh inside the tank, although the corals aren't getting thrashed and the fish don't appear to mind. Besides, I now have a great micro-bubble battle on my hands |