Basically im thinking it was the big bud because i never over used it before,So are you saying that you water everyday?
i would do a feed as follows - before the fuck up.
Water
miss a day
big bud
miss a day
water
but then i did
big bud
miss a day
big bud
miss a day
big bud
miss a day
thats when i had my problems other than that the plants have been perfect threw all 4 months.