Just hooked my APEX classic up about 3 weeks ago. Since I hooked it up have had no issues. My PH has consistently been between 8.1 and 8.3 and rises during the day and falls during the night. I received an alarm that it dropped to 7.11(3:20) from 8.26 (3:10)? Unfortunately I don't have any other PH tests right now to validate. Is that even possible to drop that much that fast?
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