newbie bubbleponics question

k this is my first cloning using this method just transfered my two sourjacks over to bubbleponics setup using perlite in my netpots got alittle bit of roots showing can i run ro water for a week then introduce the girls to nutes ????? any werd of advise

i would run straight water for another week

another week

I dont use nutes till the girls are 5-8" tall

so ro water for 2weeks my sisters are about almost 6 1/2