Can you identify this disease?

If you can, try Aquarium Science Multi-Purpose, it's gotten me outta a few tight spots with dropsy and Ich before, might help you out too.
Thanks for the suggestion. I'm afraid I need something stronger than external medication here, but furan-2 already contains some Methylene Blue, like that Multi-Purpose :).
 
Just a short update: I have just added the 4th and last recommended dose of meds. I decided on Furan-2 in the evening and tetracyclin in the morning. The fish are still alive, although I have to say that I don't see any change in the symptoms. The guppies eat as always (they also ate until they died before), and the tetras lost appetite.

I used the meds according to the direction, and the result looks truly disgusting. The tank water is a deep, murky green from the Furan-2 and covered in a foam layer from the tetracyclin. I can still see the fish, though the water is dark and not very clear.

I'm not sure whether I should stop with treatment now and try something else or go on, at least with the Furan-2.
 
I just wanted to share the wonderful color, if anyone hasn't seen that yet:

Quarantine_3.jpg
 
Your fish have Hexamitia. Go to your LFS and get one of these two products, aquazole or metronidazole. I use aquazole metronidazole is used more in salt water. This is usually caused by infected bloodworms. Are you feeding yor fish bloodworms? If so are you thawing them prior to feeding?
 
I only use freeze-dried bloodworms.

Feeding the fish with Jungle Labs' "Anti-Parasite" fish food was one of the first things I tried. It contains metronidazole and praziquantel, but it was ineffective. I'm not sure how the concentration in there is, though.
 
Your fish have Hexamitia. Go to your LFS and get one of these two products, aquazole or metronidazole. I use aquazole metronidazole is used more in salt water. This is usually caused by infected bloodworms. Are you feeding yor fish bloodworms? If so are you thawing them prior to feeding?
None of the symptoms shown could connect to hexamita. The white stringy feces just cannot show only internal parasites. IMO, I still rather think this is internal bacterial disease, not hexamita or NTD.
 
Well, I can still torture my fish with Triple Sulfa. I'm through with most of the rest I have.

I'll probably give the some rest before that, though.
 
This same thing happened with my flowerhorn and it WAS HEXAMITIA. Take out all the medication you have already used with carbon and begin treating with the Aquazole. I pampered my flowerhorn through this and he is now fine.
 
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