Local PH Calibration solution sources?

Z

ziege

I got myself a new toy... and forgot, when I placed the order, to order the PH calibration solutions that make it useful...or at least more useful.

Any good local sources? My fallback is to wait until next week and order it online, but where's my instant gratification then????
 
For the record: not as easy as it sounded. First LFS had 4 and 10 but no 7. Next had a whole bunch of "Huh?" It went on like that one way or another.

I finally wound up at Frank's and he had what I needed so all is well, plus I enjoyed a scenic tour of local fish stores on a pleasant day.
 
Distilled water doesn't make a good reference solution because it has no buffer capacity. The pH will be dependent on the amount of CO2 dissolved into it which can be enough to drive it quite low--6 or even 5.
 
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