Thanks for taking the time to reply. This is my first in hydro. I did OK in peat/perlite but even then I had problems with leaf edge burn and spotting. It seemed to show up in late veg and early flower. I think I am fighting more than one problem (learning curve) I am sure at this point that I am not over fert the plants but very well may have early on as I followed the manufacture directions. I have learned more from the forum than I did recking alot of plants. The one pic I attached shows 2 plants in veg that are in DWC with bubblers. They are both starting to show the same signs. Leafs drying and brown on edges and tips. They only have a total PPM including water of around 250. I am starting to suspect the well water as at least part of my problems? Thanks again.