I have two ways to test pH:
Over the last couple of days (when our pool water started dropping temperature - now down to the low to mid 50s water temp) I've noticed that the digital tester has come up with wildly different readings then the Taylor kit. Originally it was testing very high - 8.0-8.2 when I knew the water was more like a 7.6-7.8. Then I re-callibrated it last night using the included solutions and it's consistently reading the water at a much lower pH then the Taylor Kit. I've let my sample pool water come up to room temperature to confirm that it's not just the temperature causing issues.
See below photos. All 4 photos were taken with the pool water and sample solutions at the same temperature. To me, it looks like the Taylor Kit is showing a fairly high pH (8.0-8.2), while the Aptera tester is showing 7.4. It is reading both the 7.0 and 4.0 solution correctly.
Any ideas on what could cause this?
- Standard Taylor test kit from TFTestKits
- Aptera ph20 digital (originally purchased b/c I was having trouble differentiating colors on the Taylor kit and to get more accurate high/low readings during startup as our startup "guy" was all over the place)
Over the last couple of days (when our pool water started dropping temperature - now down to the low to mid 50s water temp) I've noticed that the digital tester has come up with wildly different readings then the Taylor kit. Originally it was testing very high - 8.0-8.2 when I knew the water was more like a 7.6-7.8. Then I re-callibrated it last night using the included solutions and it's consistently reading the water at a much lower pH then the Taylor Kit. I've let my sample pool water come up to room temperature to confirm that it's not just the temperature causing issues.
See below photos. All 4 photos were taken with the pool water and sample solutions at the same temperature. To me, it looks like the Taylor Kit is showing a fairly high pH (8.0-8.2), while the Aptera tester is showing 7.4. It is reading both the 7.0 and 4.0 solution correctly.
Any ideas on what could cause this?