Day 5 update:

The little 'worms' on the caudal fins are gone. The cories are livelier, with no clamped fins.

However, one is still sluggish looking and I see the occasional spasms from another. I've also seen those (longer ~1cm) thin wriggling worms (not anchor worms for sure) in the water ...

This is something that I have see on some of my own fish at times and I only see it on the edges of the fins on young fish. I actually narrowed it down to being caused through heavy feeding of micro worm and once the feeding quantities were reduced they disappeared altogether. I certainly do not ...

Do they actively move from their attachment site?

My "worms" are actually smaller than that depicted. At that size, it is actually hard to tell whether they are even moving at all. I need to observe longer.

Do you have access to a microscope? Be very careful when using any copper treatment in ...

Sorry but I am not getting the picture.

Ian

I have fixed the picture link - had to make it "public"; otherwise I was the only one able to see it!

After day 1 since using CopperSafe, the cories looks more or less the same.

There are very little descriptions that comes with CopperSafe or on the ...

Those look like anchor worms. Search the forums to find out the best course of treatment.

Thanks. I have seen anchor worms before and they are big (~1cm). These are about 1 mm; I guess they will grow big in no time.

I've started 1 PPT salt treatment (0.1%) and also added Mardel's CopperSafe ...

Hi

Does anyone know what are these little worm-like attachments on the caudal fin (see picture)?

I found similar ones on my juvenile C. Concolors bought a week ago. They are now in my 2ft quarantime tank, still feeding well but some of the fins are clamped.

I'm starting on a diluted salt ...

Do the Corys scrape their gill plates on the substrate?

Mark

Those that show the symptom did scrape on the bottom. I've moved them from a smaller 10G quarantine tank to a 30 G tank just to be sure the water quality is better although I don't think it is due to water.

If it is due to parasites ...

jhd wrote:does your cory roll the tail to the side sometimes, just like it would like to see the back of the tail?

Yes, that's a good way to describe it.

Hi

I have a few cories showing symptoms of shivering/twitching for 3 seconds (body contorts as well during this time). I've not been able to find such descriptions on the internet or the disease related web sites.

[Other than that, some flicking from the affected fish but no other external ...