Etherdose fertigation controller

Anyone use it?

Can't get it to work personally. I mean, it works - but the pH and EC are so far off what they should be it's nuts.

I think I may try running a grounding wire from the sample pot to the ground to see if the moving water is causing a static buildup in the sample pot and affecting the readings. FWIW, I built my own sample pot as I use a few extra probes for other measurements.

So I tried to run a ground from the sample pot screws to the cement floor and see if that changed my readings, it didn't. I then tried to run the ground to the ground plug on the wall, this also didn't change the readings.

What really gets me is that in the sample pot I get this crazy high EC reading, but then when I put the probe in a glass of the same solution I get a crazy low EC reading. This is compared to a second handheld meter which gets readings that make sense for the amount of nutrients I'm using. There's so much fluctuation in the EC with the sample pot (1.0EC fluctuation) I can't just compensate for it by adjusting my settings.