Rasbora with redness and swelling

IHaveADogToo

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Hi! I have a 20 gallon planted tank with a school of rasbora hets, a female betta, and a mystery snail. This tank is well established, coming up on its one year anniversary. I have had the rasboras since Christmas time. Anyway, just recently I noticed one of the rasboras was not schooling with the others, which I thought was odd, so I looked closer and I saw redness and swelling around one of the gills. The abdomen appears to be slightly swollen as well. Pics attached. Any idea what I’m dealing with here? Thanks in advance.
 

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PheonixKingZ

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Hello! :)

Thank you for the clear pictures! :)

It could be a wound from another fish, what other species does the HR live with? :)
 

Moony42

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It has inflamed gills. Do 70% water changes, clean the subsrate twice a week. [This is Collin_t's advice, Trying to be like him] Lol:):)
 

Colin_T

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It looks like a bacterial infection, there is red on the side of the body as well as the gill cover, which appears swollen.

Try doing a 75% water change and gravel clean each day for a week. Make sure any new water is free of chlorine/ chloramine before it's added to the tank.

Clean the filter if it hasn't been done in the last 2 weeks. Wash filter media in a bucket of tank water.

Check the ammonia, nitrite, nitrate and pH of the water. Post results (in numbers) here.

If the water is good and there is 0 ammonia and 0 nitrite, and less than 20ppm of nitrate, and there has been no improvement after cleaning the filter and doing a couple of big water changes, then look for a broad spectrum fish medication and treat the fish in a quarantine tank if you have one. If you don't have a quarantine tank then just treat the main tank.
 

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