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Old 04/15/2018, 06:37 PM   #1
MattyZ
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Join Date: Feb 2018
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When should I test?

Hello, I have a 30 gallon tank that I change 3 gallons every week on Wednesday or Thursdays...depending on OT availability. When should I test my parameters? Before or after? My tank is only a few months old and I test weekly for Alk, Calc, and Nitrate. My Apex takes care of the rest of what I need for now.

Thanks, Matt


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Old 04/15/2018, 07:46 PM   #2
bertoni
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I think it's likely fine either way. I'd probably measure just before the water change, to be sure about the low end, but unless the parameters are close to the edge, I doubt that it matters.


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Old 04/15/2018, 11:43 PM   #3
MattyZ
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Thatís kinda what Iím thinking, I want historical data on what minerals my fish and corals are using. I figure Iíll be dosing with a year, trying to understand what they need.


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Old 04/16/2018, 10:14 AM   #4
bertoni
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I suspect that's very likely.


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