- Apr 24, 2005
Anyone out there using a digital pH tester? Any recommendations of ones to get or avoid.
happychem said:I've got the Heppa brand one from National Industrial Supplies. It reproduces indicator results and holds its calibration well, as long as it's rinsed with DI or otherwise 'clean' water (not tap).
The best way to use them is to take a water sample out of the tank and test it away from electrical equiptment like lights which throw it off.