Quote Originally Posted by Amir View Post
Ront,
My cya reading with colorQ has not gone above 9 where my cya should be about 50. According to laMotte CYA is temperature dependent so you can not just add a number to what you get from the colorQ to be accurate since the water temperature varies with the season . In order to get this machine to work right they should take into account other factors in addition to color and the machine needs to be more sophisticated and probably more expensive. I for one would have paid another $50 for a more reliable machine. I guess if you think of the machine as a test fro cl, alk, ph and ch only it is not bad.
Regards

Amir

It is very easy to change the Temp of a 5 ml sample. In order to maintain consistency, I have reduced the temp of the sample to 75, very simple by dipping tube into cooler water for a couple seconds. Anyway, 6 sucessive tests have been between 29-31 for the CYA. So, while it may be showing low, at least it is showing low consistently. This is not a big deal, since the CYA test does not need to performed on a regular basis as does CL & pH.