Dirty Harry
Well-Known Member
OK, Ebb&flow, few weeks into flowering, PPM 1300, PH...My pen was out of calibration.
I just noticed when calibrating my PH tester, I can not calibrate to 4.01. It just will not adjust down that low. I have had that before and it is always the probe needing to be replaced. But it calibrated fine to 7.01 (two different adjustment screws).
Is this probe/meter still reliable?
I had just adjusted my reservoir to 5.5 prior to checking calibration and checked it again afterward. It turns out I have been adjusting low (4.XX) for awhile. I added backing soda to bring it up to 5.5 after recalibrating on the 7.01 side.
Here are some pics of my plants. Does this look like a PH problem that I expect is? I added a booster of calmag into the tank just in case as I am using RO.
I just noticed when calibrating my PH tester, I can not calibrate to 4.01. It just will not adjust down that low. I have had that before and it is always the probe needing to be replaced. But it calibrated fine to 7.01 (two different adjustment screws).
Is this probe/meter still reliable?
I had just adjusted my reservoir to 5.5 prior to checking calibration and checked it again afterward. It turns out I have been adjusting low (4.XX) for awhile. I added backing soda to bring it up to 5.5 after recalibrating on the 7.01 side.
Here are some pics of my plants. Does this look like a PH problem that I expect is? I added a booster of calmag into the tank just in case as I am using RO.
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