Help in my veg room

Sorry for the bad pics . But my plants leaves are turning dark and gettin crispy
i feed once a day filling up for 10 min by rresi they are veggin right now
they are under a 1k light . They are a nice distance from the light . I tried adding more gh micro bloom today to see if its a phosphorus deficiency
what are your guys opinions ? Calmag and protect already in the initial mix

Can't tell but the other leaves are nice and green . Just water leaves turning dark n burnt n crispy

Do u know how much ppm ur res is at?

??? Anyone ??

Hard to see with the hps. Nutes? Ppm?

thanks for the replys. this is my first time using coco . i been using the hydro cubes for 4 years. was forced to keep these clones in coco since they were already teens with healthy roots. didnt want to risk killing off the clones by trying to chop the roots and puttin em in cubes.
im using gh grow, bloom , micro in a 35 gallon resi for veg. basically using what i usually use for cubes with this coco . 4 years and this my first time having this problem with veg