Fungus, Bacteria Or...? How Do I Treat It? (Images)

[WILDER]

Is the fry tank a new set up. As fungus is pretty common in new tank set ups.

 

[gabriel.mihu]

Well, the fry tank is one of those small acrylic floating tanks. I pierced some holes (lots of them) in the side wall for water movement from the big tank. Anyways, the little ones are in a separate setup now. I took the small acrylic tank out of the big tank. I might move the tetras in a quarantine 5 gallon tank (or 10, I don't remember) for the time being and use one of my HOB filters. I will do that tomorrow. I did not want to move the fish into a new tank, so I don't stress them even more by moving them out of their original tank. I did that before (with other fish), and the fish seemed not to do well in the quarantine tank.
 
SHOULD I use the Maracyn in the big tank and not move the black skirts?
 
SHOULD I buy a water sterilizer (UV)?

 

[WILDER]

I would use the Maracyn Plus, or tetracycline on the big tank. As it sounds like you have a lot of sick fish in there.
But you will lose your good bacteria to the medication in your filter.
But at this point I do think it's the right approach to save the fish.
 
You could  move some of your filter sponges to the 5 gallon filter to save some good bacteria.and kick
start the main tank again.

 

[gabriel.mihu]

I could definitely do that, thanks.
 
Will the sponges also keep bad bacteria growing in the small tank? Will bad bacteria be reintroduced in the big tank after finishing treatment? Will reintroducing bad bacteria affect the fish again? Or bad bacteria will be very few after reintroducing and it will die without affecting the fish?

 

[WILDER]

It's a bit of a risk to take sponges from a tank that has disease. Sometimes you are just better wiping the
bacteria out. The bad bacteria soon takes the good bacteria over. But I know you are worried about losing your good bacteria. and having to recycle the tank.
 
Are they any fish in the 5 gallon tank?

 

[gabriel.mihu]

The quarantine tank is empty, not set up at this point.
 
I do have another tank set up, with fish in it, doing really well, but I do not want to use/infect that one. That one has been crystal clear for months and the fish and plants seem to be pretty happy.

 

[WILDER]

OK.
Good Luck.

 

[gabriel.mihu]

1 treatment (4 days), and a few days after all fish are back to normal.
 
Thank you all for your help!

 

[WILDER]

Thank you for the update.
Glad to hear the fish are now fine.