Cherry Alien Auto - Blimburn Seeds

I topped both plants 2 days ago. They are still vigorous. There is some slight yellowing of margins on the lower fan leaves starting. Looks like Mg deficiency. Possible the coco coir I added to the soil is stealing Mg from the plant. I'll have to water in some Epsom salts to fix that. Seems there's also too much Nitrogen I as well. Hopefully she stretches out of that.