^5 to saab,

Another piece of advice that may not apply to everything, but certainly does in this instance. Don't dose something you can't check and verify. The coraline will come on it's own and before you know it you'll be complaining about having to clean it off the glass. Without a sufficient source of calcium consumption adding more will only raise your calcium levels too high.

Buy, beg, or borrow a test kit. You absolutely need to keep one handy.