Do-It-Yourself Homemade TDS Calibration Solution

I found a page that tells you how to make your own TDS calibration solution, and your own TDS meter if you don't want to buy one and know how to read a circuit schematic. It's cool that do it yourself instructions exist for a TDS meter, but I only care about the solution to calibrate the meter I bought. 250 ppm, 500ppm, 750ppm, 1000ppm, you name it you'll get it, just modify the recipe.

Here's the link to the page...

Do-It-Yourself Homemade TDS Calibration Solution

from Hydroponics / Aeroponics
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