setup as follows:
2x2 tent
mars hydro ts 600 LED
layered brut super soil and potting soil on top to start seedling. Have not used any nutrients at this point because of the super soil.
noticing brown/rusting on some of the lower older leaves spreading slowly to upper. Not really sure which direction to go if its fungus do I cut affected leaves off? If its deficiency issue what is best route to get her back on track.