Join Date: Apr 2012
Location: Olympic Peninsula, WA
My thoughts are that you're changing the water before the bacteria have been able to establish themselves; NH3/NH4 -> NO2 -> NO3. It looks like you've got measurable nitrAtes, but the bacteria that convert NH3/NH4 to NO2 are not able to get entrenched first. Have you tested to see if your source water has nitrates? It may be why you're seeing nitrates now and are changing water too soon before the cycle has had a chance to settle in. I hope this helps. TC
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