not good. i would recommend spending the $ on a hanna alkalinity meter(49.00) and a decent ph monitor like a milwalkee. calcium is decent at 400. the cheapest way for u to buffer all 3 at once would be a kalk drip or kalk for ato. if that is to complicated for u i would recommend the 2 part starter set from bulk reef supply. i would also check mag levels.
I will look into that alk meter. I have an American Marine Pinpoint PH monitor that has been calibrated and works very well (or at least I think it does). I should have said calcium is lower than where I want it. I would like it to be around 450 ppm. I was looking at the two part starter kit from BRS. I have a LFS that stocks their stuff and sells it for less than I can get it for shipped right from BRS.