I guess I will be driving an hr or 2 to the hyrdo store unless Calmag is available at Walmart or Lowes or a garden nursery, as checking run-off will be likely impossible.

The higher pH waterings that I will need to do in the future (but not now, why?) with the Calmag, what exactly is the higher pH I am looking for, or does Calmag just automatically buffer the pH at the appropriate level?

Thanks so much Stinky, as usual ; ) Hopefully the Calmag box will tell me how much to mix in the water.