Plant deficiency? Please help

[510grower]

need some help. Having a few problem on 2 of my outdoor plants. I'm growing in humbolt gold coco in 45gal smart pots. I do compost tea once a week with bu's blend compost, worm castings, humic acid powder, and during flower dr earth bud and bloom, and recyclesil silica. I dont ph the water but I do use a boogie blue plus filter. Any help would be great!

 

[redshift75]

magnesium deficiency. maybe cal or both. can foliar a cal mag and see if it recovers to see if it recovers mag damage. wont recover for cal, but can help its deficiency. is what it looks like and i would do. from the yellow veins looks like it could use a good foliar of some light dose of nutes all around.