What is Reddit's opinion of Wiztech Digital PH Meter with ATC: 3 in 1 PH TDS Temp - High Accuracy Pocket Size PH Tester 0.00-14.00 PH Measurement Range?

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I don’t have a direct resource for you, however, I do know you want it at 4.5 or below. That is a good acidity for most fermented foods, keeping it below the level that develops botchulism. There are some devices that you can buy like this that read PH levels in liquids, I’m not sure if the linked one is the best but it’s an example of one

Wiztech Digital PH Meter with ATC: 3 in 1 PH TDS Temp - High Accuracy Pocket Size PH Tester 0.00-14.00 PH Measurement Range https://www.amazon.com/dp/B07WV7HYWM/ref=cm_sw_r_cp_api_glt_fabc_RFZBPHS4215QMYTHJE3V?_encoding=UTF8&psc=1

Calibrated about 70 days ago at the start of the grow.

No pen is perfect but I bought 2 of these. So far it's the best one I've bought. Haven't needed the second one.

https://www.amazon.com/dp/B07WV7HYWM/ref=cm_sw_r_cp_apa_fabc_R9W3A60KDRNV25PYZKKB?_encoding=UTF8&psc=1

This one has been working well for me: Wiztech Digital PH Meter with... https://www.amazon.com/dp/B07WV7HYWM?ref=ppx_pop_mob_ap_share