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Discussion Starter · #1 ·
So I have a 5 gal with 6 ember tetras, the tanks been up a few months now and I've had the fish about a month, they're full size and the water conditions are perfect, no nitrites/ammonia and very little nitrates with regular water changes, the pH is a little high for their ideal but there's nothing more I can do without using chemicals, the water params are stable. It's a low tech pretty well planted tank. I noticed during a water change two days ago one of my tetras wasn't getting out of the way of the gravel vac and thought it was odd but chocked it up to high nitrates or something out of whack with the water and went on with the change. Today when I was feeding them though I noticed a small white patch in front of the dorsal fin on one of the fish, it also isn't schooling as readily as the others and seems to be less aware of it's surroundings, but still goes for food as readily as the others and with the same enthusiasm. I would quarantine but I don't have a tank set up and I have to pack the fish to take with me to college wednesday. Does this sound like a disease I can treat? Should I take extra precautions when travelling or separate the fish in the mean time? Anything I can treat my tank with now?
 

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Look at pictures of Columnaris.
One of the common names is Saddle Disease because it often starts on the back of the fish near the dorsal fin.
It is a Gram negative bacteria. There are several strains.
 

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Discussion Starter · #5 ·
As of now my best guess now is it might be an infection from a scrape bc I added two moss 'meshes' about a week ago and they had suuuper sharp edges, I've since removed them but they had shifted out of place before I did and were in a place that the embers like to swim through, so I'm guessing it's an infected cut. I'm treating with erythromycin and if it is columnaris that should be effective as well, the fish is schooling with the others now and is still just as active during feeding time but the white patch is still there, he doesn't stay still long enough for me to get a good look at it though. I'm wondering now if I should bag him with the others for the trip tomorrow
 
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