Dwc help and advice for leaf brown and yellowing

so this is a candy cane autoflower from crop king.
I.e. Just about to flush and I see these leaves and the top big buds trichombs are still not ready yet you see Amber hairs I did a half flush on it keep some nutes and added ph balanced water (5. some lower buds look beautiful but tops not so much to close to light?

Any ideas or advice would be amazing first grow here.
Bluelab ph and conductivity pens come in tomorrow have up on cheap Amazon ones. Went threw 3 this grow so far.

Feb 1st I started in pots to present day maybe to long in fowering? Mind you the plant I'm talking about a pump have out about two weeks ago but I got a new one and still leaves are like that I'll attach a few photos here for some help and so everyone can get a better idea of what I'm saying
Sorry about the photo quality I can post from iPhone aswell these are from a tablet not best quality but I hope you all see the just of it.
Thank you for reading and taking your time to reply, look forward to hearing from some fellow geniuses haha thanks guys

When you grow hydro you monitor your reservoir every 24 hours for ppm and ph drift.

when you set your ppm and ph you want to be able to see it stay near its set point.

for example.
1. Set ppm to 500 and ph 5.8
2. Run for 24 hours.
3. Test ppm and ph. If ppm has risen or fallen by more than 150ppm and pH has moved outside of the swing drift 5.5-6.2 then correct and adjust.
4. If ppm and ph are within parameters just top up if required with original mix.

You want to try and find the sweet spot for nutrient uptake and pH stability whereby every 24 hours the hold at nearly the set point.

hoWever this set point will change as plant growth changes.

so you may find you only get the occasional day where you don’t need to adjust ppm or pH.

As plants go longer into flower (ripening etc) then the nutrient requirements become less demanding.

which results in Higher ppm when testing and lower pH.

Usually at this point you will find yourself topping up your reservoir with plain water to reduce ppm and increase pH.

So what I’m getting at is.

what is your reservoir testing at 24hours after being set?