Can’t seem to figure this deficiency help

[rockcube69]

There in coco ph 5.7-6.0 week 5 flower

Cal mag? P or k?

 

[TripsRabbit]

Looks like Mg, I'd sprinkle some epsom salts on top of the coco b4 next watering. It won't improve or fix it but should keep it from getting much worse. It will continue to progress for a few weeks even if you fix it.
Do you have the ability to brew compost tea?