Help!

[MT-Phal]

A month ago I repotted my phal into S/H. Everything was going smooth; the new leaf grew at a record pace, a new root was emerging, and the older roots weren't dying off very quickly. All of that changed this week.


Last week I noticed a small bit of mold on the tips of one of my roots, which at the time at a new bright green tip. I removed it with an alcohol swabbed q-tip. Unpotting a day later, there was a small bit of mold here and there. All removed and phal was repotted, a root or two were trimmed. This morning I awoke to see that mold had returned. I unpotted, and lo and behold it had come back with a vengence. It was EVERYWHERE. I just trimmed back one of the roots which had rotted in the middle, shame b/c the end of it was green and healthy. At this pace, I'll lose all my roots within a week. What can I do?!

The temperature in southern california has dropped at night to upper 40s. I am using a heating pad, but it doesn't keep the top layer of PA warm. Could this be a cause of the mold? I have also been using a small fan, which is on and off throughout the day... though the mold wasn't that huge until this fan was used.

I just bleached and drained my PA again, and now it is soaking in water. My phal is in tupperware with some of the roots half submerged in a liquid seaweed/water mix.

Please help. I'm desperate.