calcium?

[mattryan]

I am hoping someone could give me a bit of advice. My water in Ontario is lacking in calcium as I am getting some light borders on some of my orchids (phals). I purchased some dolomitic lime pellets and have no idea if I am supposed to crush them up or drop a couple on the top of the pots, or dissolve them in water. The components are (CA) 21% (Mg) 12% (CaCO2) 70%. Will this be ok to use? I have just started giving my orchids epsom salt once per mo. as was recommended to me, if I use the dolomitic lime should I stop the epsom salts? I also have 1 maudiae slipper and I understand that they need lime, would this be ok to use on it? Thanks for the help