Your questions about pH and Redox probes for swimming pools
ph-redox-pool.com
bot: Question ENMay 09, 2022, 4:44 pm
. If you have any questions, please let us know.
May 09, 2022, 4:46 pm
hello I have just calibrated my ph probe it indicates 7.0 but as soon as I put it back in the probe holder and filtration it indicates 0.0 set what the probe is hs it is from last year