Lower fan leaves turning yellow and dying and red stems week 1 into flower

Im growing GSC and I'm growing in a 3 gal smart pot in potters gold soil. I've been currently feeding it 1/4 strength nutes with RO water. A week ago I noticed the red stems but the plant was still healthy so I didn't think anything of it but three days ago she was starting to droop more and more each day so I had fed her 1/2 strength nutes and 200ppm cal mag per/gallon yesterday to see if it was a phosphorus def and I woke her up and noticed that the drooping has stopped but the first set of true leaves were really yellow so I had cut them off. I had woke them up today after their dark period and the second set of true leaves are now dead as well I don't know what's wrong.

Looks like N deficiency. They be hungry.

Should I do full strength nutes next feeding then?

I just fed yesterday, but I don't want the yellowing continuing at this rate. Do you think I could feed it again tomorrow with full nutes and not over water it?

Like I said in your other thread, looks like it wants N, and the drooping was similar to my first auto and wanted more Phos.

imo, I'd only give another 1/2 at next feeding and then full every other watering. You don't want to over water or feed.
Again, this is assuming your setup is like mine where I water every 3-4 days.
I wouldn't worry about Cal/mag at this point either but meh, again just me.

Yeah I water about every 4 days as well