Hey Sam, I've got some fluid that I bought at a local hydroponics shop, but I'm not sure it's the right one for my meter. Apparently my Hanna TDS meter requires a specific TDS fluid (something like 1230ppm).
Anyway, this stuff is TDS 1000 Calibration Solution. I'll bring it to the meeting and you can use it for free (or frag donation, lol). Just remember to bring your meter with you.
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Cheers,
Andrew B.
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