Every strains different I don't go over 6.8.depending on it being too high or too low of a ph it will lock out your micro nutrients or your npk. Different ph levels also causes different color hues in your pistils and plays a role in effecting your anthocyanin so experiment and figure out what...
It's a magnesium problem 100 % I'm not guessing I'm just telling you the solution the twisting of young leaf tips and those streaks in the leafs i just fixed 50 plants with this problem, and it's caused from one of 4 things, 1. most ppl dismiss this but it could be rootbound, the plant isn't...
Some times minor folds like that appear when rootbound but not as bad that's ph most likely, use a ph of 6.5 you can buy a cheap color coded kit for 10 bucks and an extra 10 for acid or alkaline
Np also tie the bitch down, if you tie a string around the tip of the plant and tie it to the side of the bucket so it grows sideways, all your branches will become giant head nugs goodluck
Lol I know the way I talk makes the sentence sort of contradict myself but it's sort of hard to tell if the leaf is folding from being roo
add 3 times the amount of natural water than the pot holds so if your using a 15 gallon pot use 45 gallons of fresh water to wash out the nutes