What is causing this? Spots on curled down and twisted leaves

[Gift.weed.exe]

The quality report is pretty accurate. Those are the analyses of my 3k population "town".

Haha, I lived in a small town before (1k pop) And the water was so nasty, It litterally left 1-2 millimeter of white residues on the bottom of the boiling pot everytime that I was trying to boil some water

 

[Entusia]

Haha, I lived in a small town before (1k pop) And the water was so nasty, It litterally left 1-2 millimeter of white residues on the bottom of the boiling pot everytime that I was trying to boil some water

It's not really that worse than the neighbouring 200k pop city, and there's dozens of 1k-5k-10k-30k towns around it. It's just how the water is around here unfortunately.