The Planted Tank Forum - View Single Post - How to calibrate my ph meter?
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Old 11-25-2012, 12:22 AM   #6
Darkblade48
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Quote:
Originally Posted by D-raw View Post
It's the one probe in the back. It's a yellow one I got off eBay
I'm not sure which model/make this is....

I suppose if it was a cheap pH probe, it'd only be a one point calibration
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