How to add nutes?!?!?

whattt upp. so new to growing but i have a seedling right now and its really lookin great. got one pair of serrated leaves, cotyledon during yellow in the middle and a second pair of serrated leaves coming through the middle. it has been 13 days since the stem poked through the rockwool cube. the leaves at first had purple at the tips and the new leaves that are like 5 cm long have a purple tint to them in the middle n when i say purple its actually purple haha. ive been watering with bottled water every time the rockwool seemed "dry". so id water em like every 2-3 days. fan blowing on them 2x a day for 20 min. i have a dwc setup.
now for the question... I want to start adding nutes to speed this process up since i leave for college on the 18th. the roots are not yet coming out of the net pot i am using so how can i get nutrients to them????? i have GH micro and bloom. (old lucas formula) any help is appreciated !!!!

btw grow medium = hydroton

umm.. I'm a little confused.. are you taking the plant with you to college?

Wait until your roots establish. THEN plant the plant in your life pot, (the one it will grow in) then the soild should have enough nutes in it for the next week or so. Start adding your nutes to your water at 1/4 or 1/2 the suggested amount and increase if needed. Start SMALL and dont fert until she is at least 6inches with multiple sets of leaves.

alright coooo and no im not taking it too college. thanks for your help. and ill have my car in college and its not a bad trip.

What about using pure green tea in watering the plants?