- Joined
- Mar 26, 2017
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- 1,380
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- Location
- Bloomington, IN
- What state or country do you live in
- Indiana
I was getting ready to set up my calcium reactor and I didn't realize I needed the blue ph 9.0 solution to calibrate the new ph probe. It's $9 on ghl website and then $15 just for shipping. I've been online and can't find any that is 9.0. Had anyone ever made their own out of anything or have any suggestions