Your ppm's are to high, I have hard water about 250ppm and mine show similar issues in the seedling stage but not as bad. Your ppms should be around 200 or lower before the cotyledons start to fade. Once the leaves show signs of burn of discoloration they will not turn green again unless the cells are still living. Unfortunately u picked a very advanced growing method, and it takes advanced knowledge for it to work properly. It's a trial and error process with fog along with proven methods of use. You cant just guess the ppms and have it run every so often and expect good results.
JackdaWack Reviewed by JackdaWack on . What now??? A few weeks back I built a pure fog system. Plz no suggestions about switching to a new method. I have my reasons for doing fog. At any rate, about 4 days ago I dialed in the system and was getting really good growth and nice green leaves. 3 days ago I decided that the water was too dirty and that I should probably lower the ppm's in the water anyway, so I changed it out. I believe I took too long on the water change which was probably in the neighborhood of an hour. I wasn't careful Rating: 5