Thanks! I didn't mean to post twice.
I use a refractometer that I check the calibration before I use it.
Also, I keep the temp low because it's such a small tank. All the research I've been doing points to the fact that problems occur much faster at higher temperatures. And with such a small tank I wanted to make sure that I have as much buffering room as possible. And if you look at tanks like copps has with his cool water angels and anthias, he grows SPS as well, albeit at a slower rate.
I'm going to invest in alk/calcium and mag test kits to see if I'm missing something there.
Other animals include:
Baby bangaii cardinal
Fire fish
Pom Pom crab
2 sexy shrimp
2 pink feather dusters
And some azoox corals (which is why I added the reactors)