Give them more calmag, that right top girl showing you def on magnesium, tips are little burn on whole plants that just little to more ec, dont worry about that until that dont progress, they for sure overwatered, couple leafs showing taco shell that sign of stress of the center, by little to high ec+magnesium def+ overwatering your girls cant hold that munch light, best solution for that case is get liquid oxygen (adv nutrients best) + calmag with ph lvl which u targeting and let them that soup as fast as u can. If that stress on them will build up they dont gonna drink what they have in pot.