Need help identifying a problem

Will test and transplant into another pot with mixed soil medium. I did my homework and got mixed messages when it came to FFOF soil. Some said they never got burned even with clones and other said they did. I believe it is how long the bags of soil sit during shipment and storage. The longer they sit the stronger they get. I’m here in Canuckville. Lol thanks again folks for helping me out. Last night I was going to feed them Calmag and glad I decided not to rush it and ask on the forum.