I water once in three days with 750PPM. This is my first microgrow with two plants which are in their 4th week veg. I started LST about a week back and so far things are smooth. Since the plant has completely covered the pot, during watering I have no option but to pour the nutrient water on the plant itself. Should this be a problem? I noticed a brown spot on the middle of two leaves and I am wondering if this happened since the the nutrient water was left on leaves. Should I directly water the soil without touching the leaves?