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PH drift

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I set my res ph with pH down to 5.8 - 6 and within 2 days it's back up to 7.1


This is causing nute uptake problems in my coco drain to waste system. I suspect I have manganese and potassium deficiencies due to this pH drift issue.


How do you guys stabilise your ph any idea what might be causing it?


I am growing autos in week 5 of flower running an EC of 1.8. I have an air stone and mixing pump running 24


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