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ph drop

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    Still Suffering from extreme PH drops in aero system

    So I'm still experiencing an extreme nightly PH drop in my solution in a 40 gallon res, absolutely cannot figure it out. After adjusting with PH up within hours the PH drops from 6 to 3.7... PPM's holding around 900, EC at 2, Used R/O water, Humbolt A&B hydro schedule... Water temp a little...
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