Little signs

hey guys I have a fruity pebbles and a four way seedling, I'm in 2gal smart pots with FFOF SOIL, No nutes, watered every 1-2 days(depends on how dry the soil gets) ph of 6.3-7, just noticed a couple brown spots on first leaves(this is the four way) and almost a burn on the other?(fruity pebbles) any help is appreciated!

Young plants are sensitive to FFOF for a short time. If the new growth looks good and continues to grow out looking good, it probably isn't a problem.