Emergency help!!!!

[James G]

My Rainbowfish has this on both of his sides (right side much worse) it looks like a red ulcer/lesion and skin looks like it’s showing when viewed from the side but looks like the scale is raised and puffy when views from the tail, and has some tapered fins, any ideas what this is? Possibly fish TB (mycobacterium)!!!??He’s still eating and swimming but he’s starting to rub his sides against the tank (so are my loaches) so I started a dose of aquarium salt and API melafix tank is planted 75 gal and has plecos, archers, loaches, and rainbows, temp is 76, ammonia: 0, nitrite: 0, nitrate: 0.5, and pH: 7.5, i have a eheim pro4+ and tidal 55 and power head, I’m doing water changes (75%) every 2 weeks, and lights are on for about 12 hours a day. Power head was recently added a power head but nothing else is infected like he is. Any help is appreciated thanks!

 

[jake37]

I'm not an expert here so you might wait for others to respond but it looks like a bacteria infection which will require treatment with something like furan-2. Do you have other fishes in the tank - if so keep an eye on them.

 

[James G]

I'm not an expert here so you might wait for others to respond but it looks like a bacteria infection which will require treatment with something like furan-2. Do you have other fishes in the tank - if so keep an eye on them.

The other fish in the tank are other rainbows, freshwater archerfish, plecos, and yo-yo loaches. But the rest of the fish look fine other than the yo-yos scratching on objects.

 

[jake37]

Well as long as it doesn't spread to the other fishes i wouldn't panic over it and it might just be a sore from a scrape or bickering with another fish.