5 Stars By Robert on 2017-11-14
Sure hope it's correct
I've got nothing to compare it to, so it is perfect.
5 Stars By Post Purchase Cognitive Dissonance on 2017-08-14
2 Stars By William arias on 2017-11-02
Not sure what happened but the bottle was not sealed it was leaking when I received it..
5 Stars By Jorge L Nazario on 2013-10-31
A must have
It is impossible to be successful in Hydroponics without knowing the TDS of your nutrient solution. This calibration solution allowed me to see that my monitor was off by about 220 ppm. A life saver
5 Stars By Charles Sterling on 2017-09-05
5 Stars By Ernest Suchy on 2013-03-19
Loved having a product like this to calibrate my TDS meter. My meter reads exactly 1000 ppm. I Love it
4 Stars By brad on 2013-03-29
it is as described. solution came in a plastic zip lock bag. only thing that would be nice is if came with a child proof cap. but other than that it what it is a solution to test ppm
3 Stars By Richard F. Winde on 2013-09-22
The calibration solution provides a baseline to check you analyzer. Given your tester is calibrated from the factory, not sure I you need the solution.
4 Stars By 74ricerat on 2012-11-16
It works fine
It appears to do what it is intended to do. Seriously, unless you have a lab to test and calibrate the calibration solution itself, what do you compare it to ? so you assume it dials in your numbers correctly. Without hesitation, I would tell others to purchase this item.
5 Stars By Rolando Melendez on 2013-03-29
Good Muy Bueno.
Muy Bueno. Logre calibrar el Medidor de PPM el cual estaba descalibrado.. Was esay to calibrate my PP Meter. Fue muy util.