im on week one of my first grow i went for the nft system but found out once i bought it that it didnt fit in my cubbord so there is mistake one. i started my seeds off in jiffy pellets and once they came through i gave them some light im useing a 500 watt sodium light with reflector so any because i cant use my nft system at this time i opted for the natural way in soil so i went out and bought some mirical grow soil and transfered my seedlings into 5 4 inch pots sadley after two days 3 of them just fell over and died so im left with 2 very strong plants which i have named karma and lucy seems as tho they are femanised seeds i started with. but on day 5 the two leaves on the top of each plant the ones that have all the nutreant in have gone a bit yellow on the edges why is this i dont want to kill these two as well ive looked in the growers bible but cant find the souce of the problem can any one help me please many thanks