Help with trimming bottom leafs

Hi all

Is it ok to trim the bottom leafs with only 3 petals they have gotten large and some are dying out a bit from a newbie nutrient burn which I corrected, whew. I had to start w seeds 5 per net pot, r wool, hdrotron, 5 bcause I need to sex them and toss half out i imagine and i needed enough to clone ect, not ready for sexing quite yet, but some plants are champs and the bottom 3 petals are seriously shading the other plants, should i , could i cut um, and where to cut cut the stem x amount away from main stalk, cut leaf tips which i see here but am unfamiliar with, plants are doing good 3 weks old now from seed, looks like cabbages, growing 1 in a night now,

I am behind a week for problems i created, didnt shake nutes first time
( what a moron ) lost 2o hours of light 1o a time, bronzed a few leafs, im learning though.

Also i am getting some mild green around roots looking up at bottom of net pots, only 1 tray of 2 is like that, I think its light penetration due to its a stacked system , any advice on cleaning flushing that tray ,

it is a drip system, how many h2o cycles do you recommend and what duration

I am cleaning resv evrey week flushing , cleaning, checking ph daily and adding 5 gal every 2 days with nutes/cal/mag on the seventh day I change all water . clean and new nutes ect.

I think I may be underwatering as they freak out when they get water, but dont seem wilty in between the 3 watersat 10 minutes in 24 hours.

drip system
3 waters at 10 min in 24 hours
tray system, water is reclaimed, too much too little? considering all else is normal at 3 weeks

green roots? flushing with h2o2? water or leave be

trimming out the bottom pan sized 3 petal begginer leafs which some are dying, others cock blocking,
wher to cut the stem or nip leaf tips?

this is a flouro system
4x2x8 room size
131,600 lumens
1,448 watts
tray lights on hangers are t5 2400kelvin
wall lights are t8 6500 kelvin
14 dollar change in my electric bill per month

thanks a lot
evrey morning is like christmas watching this work and it would have never been here without all your gardenig expertise and thoughtfull advice,

New t shirt Idea

My Hydro unit is smarter
than your honor student!


soory for all the questions


hogleg

i leave mine drip for 5mins on 20 off (water farm)works great , would trim some lower leaves start with a few an let plant get used to it ,make sure water ph is 5.5 an all good to go

yup i thought i was under watering as the outermost fan leafs are a lil dry to the touch but not from light/heat or nute burn seems internal moisture, it just wasnt evident enough to change my schedule without advice thanks for the advice franklin