Duraleigh,... so it's pretty hard to suggest a new member run out and buy one, don't you think?
This is not strictly true, as Abycat said. You can per LaMotte's tips do the following, which would give you a range to 50, well within the slam ranges published:One downside for the ColorQ is that you can't test FC above 10, so it is useless for doing a SLAM.Jim R.
my ch isn't the most accurate but the others are alot better. The most important things are to keep tubes clean and dry when testing. I ordered another 10 tubes so I can retire the older faded ones. I'll report back about accuracy and the new tubes.I had a color Q before I purchased a TF-100. I've have since gotten rid of the color Q. I used them both for one full season and my experience was that if you keep your tubes clean and perform careful testing it's consistent and accurate on most of the tests. The CL, PH and CYA tests always compared very, very close to the TF-100 kit, however the TA and CH read consistently high. Also, as many have stated, the color Q is only good up to 10 ppm for CL. For those reasons I decided to keep the TF-100...it's the one I trusted most. There was no reason for me to keep both when one did everything I needed.