Mountain Water

Wassup everybody, I would like to get opinions and facts about the benefits, drawbacks and/or peoples experience on using runoff water from the mountains. I'm sure it contains minerals and things that the plant can use and probably cannot receive any place else. Doing a bagseed organic grow tre plants or 2 1/2. Than

I'd try it.

Test the PH and PPM.

does mountain well-water count?
if so I've been using that solely for the last two decades, in three diff area, never tested ph or ppms.

Some folks would kill for mountain water.