- Joined
- Jul 13, 2013
- Messages
- 243
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- 27
How is this possible? Everyday I turn my skimmer off for a few hours. When I turn it back on after a few hours I notice that the pH actually DROPS. I have a Neptune pH probe and it is calibrated. This happens while the lights are on, so it isn't just a coincidence that the pH is dropping as the lights are going off. Any thoughts?