Nutriplex is a hydroponic nutrient... I am a firm believer of sticking to a style and not mixing them. People use nutriplex in organic but in my opnion it a risky bussines. Biobizz could be a better option as i am not sure aact and nutriplex will mix well.
Just my 2 cents
Let them be and don't mess with them , they will recover and do what they need to. The pale leaves are from lack of light , lol how long did you leave them in there....
In my opinion those plants have no value at all at that stage. They have a potential value just like all of us have the potential to commit murder. Those plants look like it was someone with a handful of seeds and chucked them as a joke.
Have to agree with kimcarsons, a 3kg plant is massive... that's at least 15kg wet... I have grown 3kg plants outdoor and they have all been over 3m tall loaded with huge cola's. Now move that indoor....
You have to leave room under the screen to work lol you found out the hard way. Why are you so worried about what's under the screen? You are growing scrog so anything under the screen will be cut away so there's no point putting lights under the screen. The scrog style of growing was made for low penetration lighting as all you need to do is light a flat plane of growth , so if you have more lights put them on top where you want your main growth to be .
Wish I could help you more bud.... I just don't have the knowledge of hydro growing to be able to tell you how to fix your issue...but I don't think you did a bad thing in feeding her a little , if you flushed the medium she will need food in my opinion as no food is also not good. Start with small amounts of food and work up. Are you using your meters like tds and ph?
Cheers
GLO
Looking good bud , nice and healthy. One word of warning though is when taking pics of your root balls never use the flash , the bright flash light will cause slight root damage. Not saying you did , I did once and just like to warn people now lol