I started using rainwater a while back. I redirected a down spout to fill a series of plastic 55 gallon barrels, using submersible pumps, etc. Used it the last few grows, all was well.
I'm wondering what's in that roofing grit on new shingles?
If you catch water in a bucket in the middle of the yard it has a 6.8ish pH...
Running off the roof through aluminum down spouts it goes up to 7.9ish...
where's it pick up a over a point in pH? the roof is a couple years old. there is roofing grit (maybe a teaspoon) at the bottom of the 55 gallon barrel. It's so fine it pumps into gallon storage jugs, a couple grit pieces in some.
what is in that grit? you can google it and still not know what it is other than some kind of aggregate or "natural mineral product".
WTF is it? anyone know?