First Ever Grow ( Alaskan Purple)

So week 3 and I can see problems already I have dun everything that I have read to the letter and couldn't work out what was wrong UNTIL I found this site Growdiaries and I was saved 🙃 so the amazing part of this site is you can click on the nutrients and see other growers using the same as I am and how they are mixing so my problem's where I am using nutrients from day 1 and the exact measurements on the dutch pro chart worked out to be double the amount everyone on here was using so mixed up a new batch with exactly half the amounts panicking so much I've killed it but fingers crossed this self taught grow works out