Trying to save my baby plant! Any advice much appreciated!

I have 4 plants going. This one plant was the first one I planted (after paper towel germinating). It was planted two days before the rest. For the record it is bagseed while the others are not.

It was growing fine and then I noticed the other plants catching up quickly. I figured it was the difference between bag seed and "good" seeds. Then I noticed the ends of the leaves curling almost like the were lit on fire. I also noticed a yellowish spot on another leaf.

All the plants have the same FFOF soil, no nutes, only water and I rotate the pots everyday to share the different lights.

Please if anyone has any ideas to help me save this plant let me know.

If you want anymore information go to https://www.rollitup.org/t/first-time-grow-indoor-low-budget-grow-op.841106/

I basically water when it's somewhat dry. I'll pour or spray water along the edges first and never too close to the actual plant.

looks like the FFOF was a little hot, i doubt it will cause a problem just let her chill, don't over water.

So basically continue as planned and it should save itself?