This is the last week before the switch to 12/12 to set the Original Gorilla #4 in flowering stage.
I've put some calmag next to the nutrients and some vitalize aswell.
Have seen some gnats aswell so i bought sticky glue traps and i'm gonna order some nematodes to kill them.
Not an expert but from knowledge gathered here tells me the big diff between your day and night temp are what might be causing the stretch!
Otherwise she looks healthy and happy. Happy growing!