trichrome timing

Can anyone share their experience with how long (days) they have seen between clear, milky, and amber trichromes?

5 days ago mine were all clear, but fan leaves were yellowing, browning, dropping like crazy, 70% of the pistils were brown and receeded into buds. So I started a "pre flush" and changed res to 100ppm nutes.

Now, I'd say the trichs are about 50/50 clear/milky, no sign of amber yet. I am prepared to change res again at pure RO, but I don't want to starve them if they have a ways to go.

Again, any experience on trichrome timing would be greatly appreciated!!! It's my first grow and I want to do it right...

I hope you pulled them??

I had troubles at that stage as well i would do flush flush u should have used quarter nutes like 8-900 ppm for a week then go straight up water. Your trikes at critical stage i would start watching them every day mine were like that last week but not r fully milky with a little amber. Hope this helps dude