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I’ve used a bunch of different meters over the years and have come to one conclusion. Trash. When a bunch of replacement Bluelab Guardian probes were bad brand new, I threw it all away. They’ll lie (even after calibration) after about 6 months to a year. Test drops have never failed me. Thankfully I’ve always had them to test against digital meters.
plant-daddy -
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5 years? I don’t believe that at all. They don’t last more than a year even if maintained properly. It’s lying to you at this point.
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NEVER buy a digital pH meter. NEVER. Throw that shit in the trash and use test drops.
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ohigrow posted an update 3 days ago
Amnesia auto. Day 95 from seed. This one got much bigger than the other 4. I’m not digging the smell though, garlic and dirt…
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