for sure, Im using FFOF soil. I put them in the fairly large, I think 3 gallon, containers they are currently in just after they rooted, which in retrospect wasnt a good idea because they wont dry out. I havent watered them in 6 days and its still fairly damp a few inches into the soil. They are about 2 weeks into veg being as I potted them in soil 21/2 weeks ago. I have only given them one 1/2 strength dose of FF grow big about 12 days ago. other than that only good rocky mountain tap water that is about 6.8PH. they are vegging under a 400w MH bulb right now. I have plenty of air circulating, about 200 CFM in a 2x2.5x8ft space. I want to give them a bit of epsom salt water but i dont want to over water. Only 1 of my 3 plants is showing this sign. it was the fastest growing and I topped it 3 days ago. Mag def. makes the most sense but I dont want to make the problem worse by trying to fix something thats not the problem. hope this is enough to spark some feedback. There are a lot of pics/ info on this grow in the link in my signature or just shoot back with some more questions. Any help is always appreciated.
Thanks
JP