Iā??m in the same situation as you areā?¦.I get a water report, but it doesnā??t specify calcium. My ppm is around 100 out of the tap. So I had the same concern.

We had a contributor on this site named Weedhound, she posted this:

Interestingly.....according to my hydro man.....its VERY hard to OD on CalMag. If your leaves are going all dark and curly that just plain sounds like overnute to me. I sat down the other day and had a fair discussion on the use of CalMag with my hydro guy.....i'll be using it MORE these days instead of less. Just a thought I'm tossing in.....

On that note I do use a small amount of CalMag+ as insurance.

I hope that this has been some help,
HMR