Is This a Magnesium Def?

Can't really tell. If those spots are white than it looks more like light bleaching. Did you mist them with the light close?

Mag-def stars with yellowing between the veins and progresses throughout the leaf with a consistent and even pattern.
 
is this a magnesium def?

Looks like some type of lockout. Unless you are going SUPER easy on the nutes a deficiency is unlikely at this stage. What is your nutrient regiment? What is your ppm? What is your PH? These will help make diagnosis much easier.
 
idk my ppm sadly i am still waiting on it to get here in the mail, the ph is 6.0 right now and i just put fresh nutes in, i had the 3 series general hydroponics (mico, grow, bloom) and i used less than whats recommend on last watering and this one....but i just put 6 gallons of water mixed with nutes and i am about to add a gallon of just water....what are most peoples nute regiment?
 
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