[5cooby Doo]

The guy was very nice. Even gave me the ph7 and ph4! It tested the ph4 at 4.1, so not bad at all... maybe just needs a cleaning and recalibration. And the EC/PPM was reading fine as well.

I picked this up for storage solution. (To be honest I got slightly confused, thought it was EC calibrating solution, but wanted storage solution either way.) This is for my PH Probe right? https://grotek.com/product-detail/el...ge-solultions/

..And the EC Probe does not need to be left in any liquid? But it will need a different solution for calibrating it than that ph probe storage solution?

[Mikell]

That is a normal reading unless he just calibrated it.

Yes, that is for the pH probe. Looks to be the same as the Bluelab solution based on the decomposition section of the MSDS. Whether the same strength I do not know.

The EC probe is more robust and can be left in or out of the reservoir. Doesn't matter if it dries. Google the care guide.

It does need a separate solution to calibrate. The Grotek version is the "1000ppm TDS" solution. This is for the 500 scale. An EC reading would be 2.0 mS/cm.

[5cooby Doo]

Was just hoping to get your opinion on this one to.... with the 1000PPM solution, (ppm x500 on the bluelab), it is measuring that as 1200PPM (ppm x500). Does that mean ppm pen part is bad, or is that somewhat normal?

[Mikell]

Probably just needs a cleaning, repeat until it reads withing 50ppm.

[5cooby Doo]

Oh thanks mate! I did clean with finger and soap (it said in manual was okay.) But maybe I should get recommended tooth brush and cleaning product to do it properly. I will try and report back.