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I’ve had a Hanna instruments groline monitor for my hydroponics setup and it did great for a while and now it goes a few days and then shows my ph has dropped to 4.34 and won’t change the temp amd ppm will change but stuck on ph. I cleaned it in the cleaning solution and then let it sit in the storage solution for 3 days and it worked when I took it out rinsed and tried but this morning was back at 4.34
from Hydroponics / Aeroponics
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