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Yeah, I always test the water. I don't own the RO system, I buy the water.
It registers 3-5 PPM on my TDS meter.
The pH flashes 7.0 and 7.1 and then settles at 7.0 if I leave it in the water for a few seconds.
I usually rinse it in the same RO water to clean the meter and also verify the reading I just took.
I have a cheap Milwaukee pH600 meter but I haven't had any problems with it so far. I don't expect it to last long but it seems to have worked fine for the last 2 monthes.
I'm just going to dump the water and start over. It's frustrating but I just don't see another way around it at this point...
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