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Old 09-16-2013, 04:05 PM   #1
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When to replace gfo

How often do you replace Gfo in a reactor in a reef tank. If the answer is when phosphates rise approximately how long does that take? 110 gall reef with 35 gall sump. I am running 3 cups of Gfo in reactor and a little carbon.

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Old 09-16-2013, 06:55 PM   #2
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I have a 60g display and 30g sump and use 2 to 3 cup in my BRS reactor and swap that out every 2 -3 weeks. I'm probably wrong do so but haven't had any ill effects . I have my tank up a little over a year now but the reactor just the last six months .
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