Ocellaris Clownfish - Fungal Infection

Hi,

After all the junk on this group...time for an actual fish question...

I bought two small ocellaris clownfish from my LFS 10 days ago.
They appeared fine for the first two days, but have since developed a
white fungus near the pectoral and dorsal fins and on one side of the
body. Both fish seemed to get worse at the same time. The area of
fungus is just getting larger and larger.

I have looked around old posts and read a few books, but nothing
describes what they have.

Its definitely a fungus as it has structure to it, plain white, and
spreading.

It doesn't appear to have affected their breathing, eating, or
activeness. They seem as happy as before this developed. I have been
treating with Maracyn 2 for the last 4 days, but no improvement. Still
getting worse. My LFS suggested malachite or I could bring them back
in for an exchange. I would like to keep them if they will recover.

Any thoughts?

I will post a pic tonite if i can get a clear one.

They are in a 10G quarantine. I checked the water quality and
everything is good. Temp 80, ph 8.2.

Thanks, Aroon