They hate my new apartment! (long)

[Sylorna]

Hi there,
I have orchid problems and I hope this is the right place to put my request for help.
Over the last year my mom (who is quite successful with her orchids) has given me:
A dracula orchid
A coconut orchid (Maxillaria tenuifolia)
and a cattleya orchid.

The dracula and coconut orchids were doing just fine in my completely non direct sunlight of my old place. The dracula was growing new growth and the coconut orchid bloomed last winter (I've had them both for just under a year). Just before I moved here in July my mom gave me the cattleya.
In August my mom took the Cattleya to cool it for spikes. It had been developing new growth at the time and was doing alright.

This is when things went weird:
I moved, and now I have some good quality sunlight coming into the new place.
Immediately I made the mistake of putting the dracula near the window, and it burned some of it's leaves. It has been moved to another area of the house where it gets medium indirect sunlight. In addition to this, I took off the worst-burned leaves (there weren't many that were burnt) and put it in a plastic strawberry container as the pot it was in dried out faster than I could keep up with. It was fine for a few weeks, but now the leaves are yellowing and dropping off rather quickly. It is watered with distilled water once a week, which leaves it almost fully dry. I submerge it and soak it for 15 minutes during each watering. It gets plenty of air circulation, and we keep the room at around 70 degrees.

My coconut orchid had one of its 4 bulbs blacken one week so I went in to take the diseased bulb out and found there was actually no substrate in the pot it was sold in, it was solid roots. So I removed the dead bulb and repotted in some substrate. I had one bulb which was turning yellow at that point, and lost it last week, however, the rest of the plant is getting darker and healthier over time so I hope the nutrients are helping.

Finally, my cattelya went to my moms house to be chilled in August/September. Her orchid is currently blooming, and mine grew a new spike but it got about 2 inches high and died. Also, it had some sucker bugs on it when she brought it back which my friend who is a greenhouse manager told me to treat with hydrogen peroxide. That seems to have worked. It is in a plastic pot with a mix of moss and bark to retain more moisture. It gets watered with a mild fertilizer every 2-3 weeks depending on how moist it is. It just seems to be getting sicker and sicker. I'm loosing about 2 leaves a week at this rate. Sunlight is about 3 hours direct, indirect for the rest of the day as it is in the window. No burning thus far.


Sorry for the long post, but I think I may loose two of these plants and I've had such good luck in the past.
Thanks for your help
Sylorna