orchid emergency

[halation]

i had two orchids when i moved into my in-laws' house. i don't think they've liked the light (too indirect, and not strong enough) but there's not much i can do about that, as they have been on my desk under the window with the best available light... the other windowsills in the house are filled with my in-laws' plants.

going through a rough time, i don't think i watered the orchids as often as i should've in recent months. it's possible i let them sit too long in the sink when i watered/fed them--30 minutes to several hours (on a couple of occasions when i forgot to set a timer). i also just discovered i've been overfeeding them, as i've been doing it 2-4x/month. whoops. one of my two orchids died.

today, i was going to reposition the remaining orchid in its pot, because it has come away from the bark, but when i did so, mold was growing all over the bark/soil media. this poor orchid is down to one tiny emerging leaf and a few short roots. it used to be so healthy. i removed the orchid from the pot, trimmed the dead roots, and set it in a damp paper towel. now i need to repot it. we bought an orchid potting mix at home depot, but it just occurred to me that the orchid is probably way too small for the pot that i have.

this orchid was a gift to me from my boss in chicago in 2002. i don't want it to die. i need some quick advice from someone who knows a lot about orchids. what can i do to help this little one regain its strength? any advice is appreciated. it's so small--what size pot should i use? should i feed it right away? what can i do to nurse it back to health? i'm so worried!

thanks so much!