Anyone have an idea on a reasonably price PH controller that has charting (recording) capabilities? I see the Hydros X3, the Apex and the GHL..but these all run 300-600 for the entry levels. You could buy a questionable used one for maybe 15% less which I would rather have the assurances of new. The Milwaukee and the pinpoint are 100'ish and allow for reading but there is no tracking PH over time.
Thanks in advance.
Thanks in advance.