tips of leaves are curled

the tips of my leaves are curled on my mother, i waterd her about 2 days ago and realize the tips are curled now, she should be fine jw if this happends do to watering orr is there something else wrong.

maybe your overfeeding them??

that could be a possibility becuz im using miracle grow potting mix, but i cant change it to the pro-mix bx i have becuz its in a recycling box and its a "mother" lol but that could be it becuz i use DNF gro A&B nutrients as well, i feed then dry dry dry then water then dry dry dry then feed etc etc. i giv it a liter everytime, and when i feed i put 2.5ml of each A & B.. dutchnutrientformula.com

my next question tho is my stems of the leaves on the same plant are purple, now this has bin happening since the beginning (its over 7months old now) and i used to not think much of it, but now im actually pretty curious cuz i dont see it on any of the other plants, so im thinking its just the strain or becuz of the soil. it could be purple kush becuz i had alot of those from old batches and i just took it out of a random bag of seeds. so i dono.

usually when the stems show purple it means there is a def, have you checked your waters PH?

ya i use ph drops, have bin using them for the last 4 months..

in my opinion those drops suck, inaccurate but thats my opinion. Have you ever had this problem before?

ya i dont have the money to get digital testers right now, and the water is pretty hard here so i dono, and all i do is leave the water sitting out for 2 days with air pumps in them. it was my first grow with the mother and i kept it just becuz it was my first one and it was female, good enough for me, im learning to clone, doesnt seem like its going too well but idk ive got lots of seeds and lots of setups so i'll get it figured out eventually.

like i said tho, the mother has always bin like this, purple stems to the leaves. but all my other plants dont seem to b doing that really, some are a little red actually, i dono im going thru some phases with them lately, learning all these new tips and trying to apply all of them after already starting them u know, kinda fucks them up a little lol but if u go to "rate my setup" thread thats my setup obv. i took those pics august 5th i think so some are in bigger pots and with different soil (being the promix bx).

wow im high, im reading what im writing and it sounds so intense lol