Nute burn on my seedling

I know it can't be heat stress. I ruled that out. I'm using a tube Fluro and have an ac in my room. I'm using organic mg for soil with NPk at 10 5 5 mixed it with seedling soil because my seedling soil was to light every watering it would push the seedling down to the point of no return but I also used this for all my other seedlings and no burn any ideas

Pic please! And how old is your seedling? Off the top of my head, it sounds like the nute strength in the soil you're using is too high. But pics would help!

But my other seedlings r thriving ? Lol and I thought I posted the pic

GrowForReasons said:

But my other seedlings r thriving ? Lol and I thought I posted the pic

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too much nutrients for these baby clones add happy frog soil to them to reduce the nutrients in your soil

Yeah if it happens to aany others, I will get the frog