Flukes or Fungus?

Hi,

My corys started scratching themselves against the sand a last week and I noticed these things on my corys yesterday, overnight they have spread and are now covering the faces of 3 of them, with others also infected.

I live in HK so its hard to get some of the treatments available in the US etc, so far when I went to my LFS they told me to try Argumor, then Medimore. Neither have worked and I don't know what to do.

Any help would be greatly appreciated, I love these little guys and want to see them get better.

internal parasite?

My thoughts would go to protozoa.

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Thanks for the reply's,

I have already lost 4 of my big Cory's to whatever it is. They seam to be responding to Fluke medicine but at this stage I think its too late for some of them.

It's really hard to get any reliable info in HK, let alone treatments. Please if anyone can positively identify whats wrong and make any suggestions regarding treatment, I would be very grateful.