Quote:
Originally Posted by saltwater2999
when you say large water change how much would that be . like I said I have a 55gallon tank with a 20 gallon sump
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25-30 gallons.
Remember you don't have 75 gallons of water in your system. It's likely to be more like 50-55 depending on rock, plumbing length, and sump water level.
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Current Tank Info: Construction Zone
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