It has been a LONG time since I tested the water on the Lightning Maroon’s tank.  The Birdsnest Corals are all growing, some quite rapidly.  I already hacked off a dozen+ frags on the “Sour Apple” Seriatopora as it was starting to shade out smaller corals.  The pH swings I was experiencing seemed to have lessened in severity.  While the pH probe seemed to be still getting valid measurements, it seems a calibration may have helped.  Part of the issue may have also been temperature related – installation of an Air Conditioner in the room helped temperature more in check, which may have slowed photosynthesis a little, and been one more thing to help reduce the pH extremes  that the Apex was reporting.  Finally, I reduced the frequency I was dosing C-Balance 2 part, but I may have to step it back up after getting these readings.

pH (Seachem) – 8.1
pH (Apex) – 8.22
Alkalinity (Seachem) – 2.5 meq/L
Calcium (Salifert) – 360 ppm
Magnesium (Salifert) – 1170 ppm
Nitrate (Salifert) – between 2 and 5 ppm

So, probably a water change and staying a little more on top of a daily C-Balance dosing regime ought to keep things in line.  Frankly, I was surprised the Nitrates weren’t higher, but perhaps the very low-level Vodka dosing is doing the trick?