I turned the skimmer back on earlier this week, but noticed NO3 wasn't being reduced anymore. Turned the skimmer off yesterday and saw a slight decrease in NO3 levels since last night. This goes against all my experience, but it looks like in my situation, skimming reduces the effectiveness of the system.

Corals look great. Many of the them have new growth nubs. All blue and green acros seem a little brighter, but maybe my eyes are playing tricks on me. My borealis frag is regaining it's bright blue tips. A red milli has some of the longest polyp extensions I've ever seen on it.

There was a little brown algae on the substrate and a patch of cyano that appeared since last week, but most of that is already disappearing.

Tank specs:
ph 8.3
alk 9dkh
ca 420 meg/L
NO3 10ppm low range