Mike the slow rate threw the sump is just allowing for the more skimmer time to clean the water and heat the water faster that is all. before a lot of reefer's believed in the ultra fast speed of water through their sump. because they had huge return pumps on there tanks for the turn over rates. Hence the better options for turn overs in the power-heads now
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180 starfire front, LPS, millipora
Doesn't matter how much you have been reading until you take the plunge.
You don't know as much as you think.
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