Yes, Physan 20 can help but it will not eradicate the fungi infestation.
There is a list of home remedies= particularly Ray's suggestion:
http://www.orchidboard.com/community...-remedies.html
---------- Post added at 05:28 PM ---------- Previous post was at 05:22 PM ----------
I also got this concoction from the other forum I was in:
15 drops dish soap
1/4 tablespoon cinnamon extract(the one you get in the supermarket baking aisle)
2 cups tepid water
put it in a spray bottle and spray the plant all over....make some more batch and soak the pot for 10 minutes soaking the roots and the media mix.
repeat the next week