Magnesium Deficiency?

First grow here, 5 out of 11 of my plants are showing a deficiency of some sort wondering if I could get some opinions to put my mind at ease and get this solved.
Environment is all fine, great air flow no direct fan on plants, 70-75 degrees 35-60 humidity Ph levels at 6-6.7 every feed. Nutrients using only Liquid Seaweed at 4ML per gallon and 1-2TBS of Molasses. Just this week I got Cal-Mag thinking it’s a magnesium problem fed 5ML per gallon hopefully that fixes this issue. Thanks Gentleman!

If I may suggest alternate from calmag and liquid seaweed both are high in calcium.
The speckles in the middle picture suggest to much the others not enough.
Are you using strips for ph or a meter and if meter may want to check calibration as when I get speckles like that my ph probe is outta wack

Quickest way to get nutrients to the plant is foliar and epsom salt is full of magnesium.

What type of soil are you using?