One thing to consider when going with high flow through the sump is that your return pump is going 24/7 so the higher the flow, usually the more electricity you'll use. Just discussed online with another reefer how his hydro bill went up $100 due to his tank and he had a Mag18 on a ~45g display which uses almost three times the electricity of the much smaller return pump on my 165g display (90g wide sump). Our hydro bill went up 7% this past month and so having a powerhog of a return pump going 24/7 is a real concern for me.
Just a thought.
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