And pic five seems over or under fed she's thirsty bro.
So rule one;don't flush, I feed every watering at half dose if not less and ive never flushed.. Gimmick.second hover ur light or out the pot on another larger pot she needs more par as she's very leggy,could be the strain but I'd conclude she's stretching for light.
And I also see nute burn,slight is fine to see ur bounds with the strain but 2 much u goofing ur roots dog and cannazyme to help a brother out.if u do have a ph pen use it n this would of never happened.no offence but u should read more about spotting deafs and general botony. Look into how plants work and you'd get more factual info than on here.