Re: Low PH
Don't waste your money on a digital tester. Get K-2006. The strip readers are only as good as the strips (which means not good at all). LaMotte does make the ColorQ. It is ok but has limitations (since all the tests are colormetric and not titrations) and is not any more precise or accurate than a K-2006 and often is less. I have used digital testers when I worked in a retail store and our LaMotte colorimeter cost over $1000 and I still used K-2006 for backup when the limited range of the digital tester was exceeded! Also, when LaMotte came out with the ColorQ I asked their tech support if it was any good. He said, It's a $100 meter. It's good for what it is.
The handheld pH and ORP testers are not worth using either, They require a lot of care and maintenance, must be calibrated with standard solutions, and the electrodes have to be replaced regularly.
The only digital tester that might be useful is a salt meter. (It still needs care and calibration with a standard solution) IF you have a salt pool. However, this is one test that strips do a decent job.
Retired pool store and commercial pool maintenance guy.
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