Hi
@Grownewgenetics! Check this out: https://greenleafnutrients.com/feeding-calculator/ as you can see GreenLeafNutrients feeding schedule suggests an average EC of .55 (277ppm) for seedlings, 1.1 (555ppm) for regular veg and 1.25 (625ppm) for an extended veg. I wouldn't use FishMix and Megacrop simultaneously, that's a lot of Nitrogen, especially for an auto. Hope this will help, keep us up-to-date and happy growing 👊