Advise Needed in Spotting Nutrient Deficiency

Hey everyone. Just need a pair of experienced eyes to spot the deficiency in my plant which is currently vegging at 6 weeks from seed, at 450ppm and pH of 5.8. The reason I kept the ppm's low is because I noticed burnt tips for newer leaves and held back on the nutes, but that seems to have brought up deficiency symptoms.

My guess from the streaked greens is Magnesium def and that the few spots are likely from Calcium def. Would I need CalMag supplementation for this or just a dose of Epsom Salt would do, if this only looks like a Magnesium def.

Sure looks like Mg def,a quick foiler with epsom will let you know.

How often do you change the res? Does your ppm drop or raise day to day?

What nutes are you using. For the most part your nutes should have everything the plant needs at this point.