sounds all pretty good. Alk is a bit high, but not absurd. Also, reef crystals has very high calcium, so for yours to be low would surprise me, especially with nothing in the tank to use it up. I would either double-check your test with your LFS or a nearby reefer with a different test-kit. Also, if it is the correct level, then check your magnesium, because if your magnesium off, you could add calcium til your blue in the face, and it won't go up. With reef-crystals, you should be much higher on calcium. I used reef crystals in the beginning, and my calcium was 450 or so.