I know a lot of people don't like the Oceanic salt, but you could switch to that if you really want a high calcium level. I never had to add calcium at all to my tanks when I used it. Just doing water changes kept the tank at 450-470 or a bit higher.

I need to get a new calcium test kit so I can test what is going on with the new salt I'm trying. I'm now using the Tropic Marin Pro Reef salt. I did notice everything "liven up" when I started the switch 2 weeks ago. I'm still in the process of switching salt and have almost completely phased out the Oceanic.

As for the alk, I used to use the Kent Marine superbuffer-dkh when my tanks got low on the alk. It is a very good product to "quickly" raise the alk. I'm just not too sure on its ability to maintain.

If you ever need any help with your tank let me know cause I'm here in San Marcos as well.