Magnesium deficiency or probable lockout in coco coir

Could be lockout, to help identify your deficiency issues I recommend reading this blog https://futureharvest.com/blogs/articles/how-to-identify-cannabis-nutrient-deficiencies?_pos=1&_sid=f81d0e725&_ss=r Because symptoms often progress even after applying a curative approach I'd just make sure you are following your nutrient schedule keeping EC around 1.2-1.5 or so and maybe go easy on the epsom salt. Often times its a good idea to flush the media of nutrients with alot of water and then just introduce calmag to your regular feeding schedule. Lockout can occur too when a plant's environment, watering regimen and temperatures are out of whack. Coco coir can be slow draining so make sure it dries out before each watering. Hope this helps! -Bryce from Future Harvest Nutrients