Im a first timer growning in my closet. I must admit that my set up is amature at best. I took some midgrade seeds out of one of my bags and decided to germinate them and grow in my dads old photo pod. The first couple of weeks went well with strong seedling growth but since then I've seen the health of my plant declining.

Heres my set up:
PHOTOTRON 2 grow pod
closet
mid grade seeds
miracle grow soil
24hr. light
bottled water fed

My problems:
no ventilation
no fertilizer schedule
uncontrolled heat and humidity

Plant health:
I don't have any pictures yet but I can describe what the plant looks like:
about 16inches tall
lower leaves started to turn yellow
most leaf tips are begining to turn yellow
some holes turning up in leaves (burn holes?)

Somebody out there please give me some advice. Can my plant be saved or will my rookie experience have to go down as a failure?