Worm castings and plants with nutrient burn

I don’t know to be honest w you. That is stuff i did when growing in salts and coco. Checking ppm through runoff is a way of telling if your plants are eating or not, but again, that is in coco. I wouldn’t advise doing that anymore as you are just flushing out nutes. I keep my pots moist to keep microbial life up but never water to runoff now in organics. I chased the game last year just as you seem to be doing w your grow. It just led to frustration. Running several different strains at the same time may present issues for you as well. Different strains feed differently. I would encourage you to read the “official gia green grow method” in the organics section. There is tons of good info there. Good luck w your grow