High Frequency Fertigation

I am practicing high frequency fertigation as outlined on cocoforcannabis.com. I am very excited to try this as I've done a few "set it and forget it" outdoor grows with pre amended soil that only required watering. I am mixing my nutrients as per the recommendation for NER by Green Planet, then diluting to achieve desired EC targets. I will be measuring EC outflow daily until I am confident EC is stable in the runoff from each plant. The babies are looking great! BD came up with some bleaching on the cotyledons. Not sure what from. Could be due to the shell coming off early, being difficult or due to genetics. Plants looking great for week 1 veg!