i think what Red meant by self calibrating is where you press a button once the meter is in the calibration fluid. Manual would be the type of meter that you have to turn a calibration screw to set it.
Finally got my meter calibrated and tested my run off. The ph going in was 6.5 and coming out was 6.7. I watered in about 2 gallons of water to lower the ph to 6.5. Is there anything else I can do now to help her get back on track?
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