@No_Coast_Genetics yes i read all about salts, i washed one brick at a time in a large bucket = soak 30 minutes and rinse, three times each brick, and once the 5L pots was filled I did a improvised stop down type of buffer, with hopes the coco will stop down long term. yes i need a proper meter for coco pH.
I keep going back to germination stage. in week 2 i describe how my seed and wet paper napkin was in a cupboard next to a laundry dryer fabric softener sheet. This might be why #2 plant is all yellow. might be an error on my part but now I have an understanding how seeds can be influenced. helps with directions for learning sessions.