hey there DnB, the tacoing could come from the light burn, but honestly it's no major compared with the magnesium deficiency. This you can tell from the yellowing on the serrated edges of the leafs, the newer growth being affected first, and the fact you're not adding any cal mag. You basically always need to at least have cal mag on hand. Right now you have three additives, and one NPK, you always want (basically) one additive, one calmag and one NPK for a complete feed. Just add cal mag asap, and keep it on hand for next time. Hope this helps ! 🚀