I just recalibrated my Apex PH probe and, to my surprise, the PH of the tank is higher that I thought. My daily PH swings are consistently between 8.2 and 8.5 (I dose alk at night and have my sump light on at night to minimize the swings).
Most articles recommend a PH of between 8.1 and 8.4. Is the fact that I'm seeing 8.5 a problem? What are the ramifications of a high PH? At what level should I be concerned?