hahahahahahaha sry bro i had to......place the white root down first about 1/4-1/2 from the top water and wait about 1-3 days depending on the strain......good luck
awww shit i didnt see the hydro part......im sure a hydro guy will be by soon to help with ur water tubes and all the hydro stuff.....happy growing tho (hydro not my style)
Lol its ok I just saw many threads and shit that says plant the seed when its cracked and dip the rockwool cube in the water and place it in a humidity dome