Def comes down to preference here. The best way it to let a plant go til its almost about to rot one day and see if you like the effects with more amber or not. You’ll also get good feel for what late stage looks like. If you wait too long tho it can start to rot the buds so approach with caution.

I’m a truck driver and had to give up smoking couple years ago and I grow now so the wife has clean meds and I love it. Beautiful plant and super fun lil hobby.

Unsure I’ve never ran that line before. Salt based nutes shouldn’t have any buildup but organic based lines can for sure. But you definitely have root rot going on based on the other pics.