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Old 02/18/2018, 05:21 AM   #4
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Join Date: May 2015
Location: South Africa
Posts: 195
I think your going keep fighting yourself leaving the same amount in there tho.
Take some out & put in in a holding system like qt tank or bucket with flow & feed it to keep the bac alive till you balance where you want to be.
Adding the KNO3 is going to keep pushing your po4 back towards zero till you remove some bacteria mass or add some fish

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