<a href="https://www.lenr-forum.com/forum/index.php/User/1285-Wyttenbach/">@Wyttenbach</a>,
A few days ago, I was at a river with a naturally acquired pH of 2. Aluminum wasn't even close to being on the nasty list in that water, comparatively. I would sooner eat a teaspoon of ground aluminum than a teaspoon of the lake bottom mud…
I'm no chemist but on pH scale of 1 to 7, 2 seems like a rather strong acid. According to a quick google search, lemon juice has pH of 2. I can't imagine a whole river of something that acidic and what it would do to the immediate surroundings. Where is this river?