First Grow

This is thrip damage. I prefer Azamax or azapro, or if you don't want to use a pesticide. Start foliar feeding with Armor Si. It will make your plants stronger and bugs hate the taste. It will make your plants more resilient to bugs. Spray very lightly! Not a heavy dose. 1/4 the recommended. 1 or 2 times a week. If you spray to much it will burn your leaves. Look up growweedeasy.com for great information

That looks like a cal-mag deficiency to me. Every time my plants do that, I increased my cal-mag and the problem would stop. The damage already done will never go away but new growth and old growth wont do that anymore. Also helps to check pH before making any adjustments just incase your pH just fell out of its uptake zone.

What’s the ph of the water and or water/nutes? 5.9 is not that bad

Hey Catova a, continué de donner de l'engrais tout en diminuant les dosage progressivement jusqu'a la chasse d'eau. #LoveUnityAndPeace

I would say your judgement is pretty good. Just keep an eye on those trichs. 20 to 30% amber for good couch lock.. Cheers

Is that the only single tiny piece of that fluffy stuff you can find? Might just be a random bit of fluff - take it off if it is upsetting you and separate that bud in drying to see how it goes. It looks like you are ready for harvest from them trichomes buddy. Well done!