Nutrient Deficiency?

I am new to growing and having some issues. I have only been growing Morrocan kush, but just recently decided to grow multiple strains. I also just switched to General Hydroponics 3 bottle system and CMH lights (was LED). I am having my plants slowly turn yellow at the ends and eventually to what you see below. I thought it was a magnesium deficiency, but after giving them some cal-mag it is still getting worse. It only seems to be on the tops leaves. My lighting is at 50k lux, the heat stays around 75, and 50% humidity.

Got some pretty significant burn going on there. Cut back on the Nutes, but not out entirely. Won’t fix the damage that’s already done but we’ll help with it getting worse. How far into flower are you?

I am 4 weeks under the CMH, but not sure as they accidentally went into flower when I moved even with the light cycle being 16/8 they kept flowering for weeks before I moved them over. I tried cutting the nutes out for a week and it got worse, so added them back and continued to worsen.

Almost positive this harvest is a fat rip but would like to know for the next time.

Learning2GrowWeed said:

Almost positive this harvest is a fat rip but would like to know for the next time.

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If they flipped to flower without you knowing it and you still had them on a veg schedule, they probably got too much nitrogen. Nitrogen is still necessary in flower, but no where near the demand in veg.

Would nitrogen toxicity cause this?