Hi Seedling....

Well the good news is....
you can save her..

I beleive you have some sort of nutrient LOCK..

She needs to be transplanted ASAP....
preferebly into a 3-5 gallon pot with a 80% soil , 20% perlite mix...

Then water her with 6.8 ph water...


What kind of light are you using... Looks like HPS... correct?

you have not over FED.. in the general sense... cause you burnis not from the tips... but you are having a nutrient problem...

try to remove as much soil as possible when you transplant... but do not disturb the roots..

I know that will be difficult...


LOVE

keep us posted