3 week pics 1 big 3 wimps?

here are some 3rd week pics of my babies one is doing good ant the other 3 are not growing. they are healthy, good root system but no more growth above the rim. not too sure why

sorry the light is too bright for camera leaves lines

can anyong guess as to why 1 is so much bigger, and she is growing faster everyday.the others are growing......just so slow and this may cause some problems cause she will hog all the light down the road when she fans out if they stay at this rate.
big one grew like an inch last night

males usually grow faster than females, but yours are too young to really tell that. it is probably just a difference in phenotypes. that one just has strange genetics prob.

you are prob gonna wanna give a little more info on your grow for people to really give an educated answer though.

what do u need to know?

using nutrients? if so which and how much?

im no hydro expert but i feel like someone else can help you out