Strange curling in leaves

Hey all,
I’ve been growing some cookies gelato photoperiods from royal queen seeds and see some strange growth in the leaves. I grow my plants in coco with the general hydroponics nutrient line and always water between 6-6.5 pH. The new leaves appear to be slightly curled and the larger fan leaves point downwards. The stems are also slightly purple but I’m not sure why since I always water them with cal/ mag and the coco is buffered. Any tips or advice for what the problem could be and solutions would be greatly appreciated!

Nitrogen toxicity.

Flush with PH water 5.8-6.2 ish.
For coco
Check if you have hard or soft water then readjust cal/mag to fix it.

Look for new growth to tell you the problem has been fixed. The older leaves with those downward tips will most likely not recover. Also check your temps to ensure you are not stressing the plant further, causing it to drink more, which leads to more uptake of nitrogen

Okay thanks a lot for the tips! I’m flipping to flower in a few days so I’ll change my feeding schedule and flush before hand.