Ph issues in water I'm thinking my plants looked like that before I was using tap water then I started melting the ice cycles off my roof and watering them with it and it went away no build up of calcium or chlorine and its natural I'm guessing it's better to water with a low ph so u not...
So have I shit people burn outside doesn't harm the plants they work as filters they filter everything out of the air and put out clean oxygen that's a plants purpose