I don't know how well the pics convey what he looks like in real live, but this is one of my male diamond tetras. His skin is very splotchy, missing the shininess in big areas (worse on one side than other) and his fins are eaten up (he had long gorgeous fins as of a week ago). He is in a 55 gallon tank with 7 other diamond tetras (was 8, lost one that looked similar a week ago, along with a yellow rainbow), a female Boesmani rainbow, and a small peacock gudgeon. He acts perfectly normal at the moment. Last August, this was a rainbow tank that also housed cories and a couple of stragler mollies. I foolishly had a couple of fish shipped in and didn't quarantine, and ended up wiping out the entire tank except for the two rainbows. All of the rainbows that I lost displayed similar symptoms to this diamond tetra prior to passing. The diamonds were in another tank, but were moved to the 55 about 6-8 weeks ago (in batches over a couple of weeks just to make sure it wasn't too much at once for the bio filter to handle) - well after the issues had subsided. The only things in the 55 at the time I moved the diamonds were the two remaining rainbows. All seemed fine until the first diamond passed last week, followed by the rainbow, now this guy. The tank has an eheim 2217 and gets 50% water changes every 10 days. Ammonia and Nitrite are zero, Nitrate stays at 20 or under. There are no issues with the other 8 tanks in my house, and the diamonds and gudgeon had been in the other tank for months without issue.
Aside from just wanting to know what's wrong so I can hopefully treat it before it wipes out the rest of the tank, I'm curious what would have caused it to rear its ugly head now.
Aside from just wanting to know what's wrong so I can hopefully treat it before it wipes out the rest of the tank, I'm curious what would have caused it to rear its ugly head now.