Thanks for the comments. For most of the life of the tank, I have used Tropic Marine Pro Reef Salt and I do a 3 gallon water change every Monday. When I use this salt, my calcium stays nice and high and I don't have to add anything but buffer. When I ran out, I used instant ocean for a couple of months, but I noticed a decrease in coral and halimedia (sp) growth even with added calcium so I'm back to the TM Pro Reef.
I recently had a minor disaster though...At the top of the photo, you can see about 2 inches of dead coraline algae. The red macro algae that I had in my fuge clogged the return and I had a 9 gallon spill over onto my carpet... The fuge pump kept pumping until the water line in the tank went below the pump intake. Needless to say, it was a big mess. Had carpet cleaners come out and now we have to repair the ceiling in the garage. I fortunately did not loose anything and the photo was taken after two days of no lights on the tank (they are hanging from the ceiling and I had to move the tank to pull up the carpet.)