PH is at 6.5 perfectly and that’s what I’m doing water in twice maybe three times and then feed it comes out to about once a month maybe twice and I do feel my thoughts see I got told I was overwatering them last time I post. And I was watering youAnd I was watering Every four days and so I went for a week watering them first thing and literally they look fine the night before the next day it’s like they all just drink it wantEvery four days and so I went for a week watering them first thing and literally they look fine the night before the next day it’s like they all just droop at once and perk right back up. And I have dyna grow nutrients for veg and it’s high in magnesium I’ve tried that they stay with the purple steps. Thanks for the link I’ll look at itin soil its generally a good idea to water twice then feed, water twice, then feed....and don't let them actually droop, learn to feel the weight of your pots, you want them to be light, but not so light your leaves are all drooping.
the purple stuff is probably a phosphorous deficiency. if the petioles (where the leaves attach to the stem) are purple, you need magnesium.
make sure you check your ph and adjust it to between 6.0 - 6.5
here's a handy link to help identify issues
https://www.royalqueenseeds.com/blog-cannabis-nutrient-and-deficiency-table-n88