what could cause this

these are not my plants, its a friends.

what do you think is causing this.

Coco grow , ppm 460 , ph 5.7
Temps around 75F

cal mag or am I way off?
I've looked at deficiency pictures and cant tell.

It looks overwatered to me....


Jake

hi Jake , you sure its defo overwatering m8?

The first pic kinda looks like cal mag from the pics ive looked at.. But I've seen that many deficiencies that look similar..

Anyone else have any ideas.???

id get that ph around 6.5 and hold off the watering a little let it dry out and maybe next feed shot a small amount of calmag in there see if it helps all trial and error mate just dont add stuff in mass amounts and give urself an abbundance of other issues have u been adding alot of nutes could be a little toxicity ?