I thought the book "Reef Secrets" was pretty good and it helped me out quit a bit.

I use Purple Up and Kent Turbo Calcium. I don't have a calcium reactor because it would be sitting in my dining room:) All I do is add a capful of Kent every other day and a capful of Purple up every day. My Calcium stays between 425-450. However, I have quit a bit of LPS, clams, and 160lbs of LR, which take up alot of calcium. I only test my calcium once a month now because I've tested to see how much is taken up on a regular basis. I add Magnesium, coralvite, and essential elements every other day in small doses. Good luck gdeeber...