Leaf probs, similar, but not exact, to what i see a lot of on here. Help

Got a scrog going under a 250watt hps. Medium is 50% peat moss, about 30% perlite, about 20% worm castings and a couple tablespoons of agricultural limestone, as far as i can understand its basically the same as that dolomite lime that a lot of you use. 17 days 12/12 after a 6 week veg period. So basically what you see explains it. Been showing leaf spots and some curling since about 3 weeks in but it has been slow. Only recently did it start spreading around faster. I thought at first it was a over-fert problem, I was using FOX FARM 6-4-4 at 2 tsp per gallon then did 3 tsp per gallon twice, and someone mentioned that they never heard of using that much per gallon and I thought over-fert. I flushed it with distilled water, not a whole lot but since it's organic fertilizer there really wouldn't be a lot of salt build-up anyway. Well after the water, which was last week, it seems to be going even faster, so then I though "deficiency". I was leaning towards Magnesium, because of the symptoms of a couple leaves and foliar fed some 1/2 tsp per quart of epsom salt. So I guess I had to resort to pics, and here they are. If anyone has any idea I would appreciate it

Feed it then give water when soil is dry for next 7 days i hope you not just feeding it then next watering time you feed it agean in durt it is burning your roots causeing leaf to die at tips im just assumeing you haven't said your watering cycle, Your makeing shure durt is dry finger leigth in befor you water?

ouch, looks like overferting to me...