Long Lost TDS meter

[cee]

Looks like there is a difference between NSW and KCl solutions, how much so I've not done enough research to comment on (probably just a few percent). Same problem will occur when using the CR's solution unless it is designed specifically to calibrate a refractometer with. Holmes-Farley has done a cal solution but I don't have a scale accurate enough to weigh it out unless I take it to work.

I knew there was a formula somewhere just didn't know where to look. We usually stock 5.3 standard but are out atm. I'm almost 100% certain that they use Potassium Chloride (KCl). I honestly know nothing about the difference between salts, all I know is my tank has some.

Once we get some more in I will have Coral Reef calibrate my refractometer and immediately do a side by side between my tank water and the KCl solution.


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[DevinWolfe]

I should be open all day tomorrow, except for a few errands that I need to run...and may hit up bike night about 7-10pm. Gimme a shout when you decide on what is a good time and we'll get together.

I work until 6:00 but should be home by 6:30, so anytime after that would be fine with me.

Looks like there is a difference between NSW and KCl solutions, how much so I've not done enough research to comment on (probably just a few percent). Same problem will occur when using the CR's solution unless it is designed specifically to calibrate a refractometer with. Holmes-Farley has done a cal solution but I don't have a scale accurate enough to weigh it out unless I take it to work.

CRs solution is supposed to be specific for calibrating refractometers. I keep meaning to take mine in for Mel to look at it as I bought it used and just want a double check. If it's close then I'll do some real comparisons to make sure it's good enough to rely on for refractometers, if not I'll just scrap the idea.