why so big? I DON'T KNOW ?

they look good in veg state {lots of bush} 400MH
went to 12/12 {1000 hordux bulb} with veg nurt for a week ,after that week some small branches fell off
and they could barly hold themselfs up,
change water ,nurts to 70% flower 30% grow,ebson salt every other change
They shot up like hell,
they started to pop flower out where there was nothing
light was 2-3 feet away,

now light is 18 inches away {Top of room}
should I still keep nurt ups ?
any special additive to bost buds ?
what makes big buds ?
what do u think , to much of something? or not enough?
138ppm tap water,then added ebsolnd salt{roots are white}
what happends with too much mg.
OR
is it there big, so keep feeding them ?{going to switch HG liquid} any problem with changes nurt type? durning grow?

will the plant grow big with little buds?{not what I am looking for}

what the best thing to try?

Will it take longer to finish being its big ?

soil dude pounds on me every day
going to try anything
thanks