Almost all my Panda Cories are wiped out. I had one that died about 2 weeks ago, and within a week, I had 3 that died, I have only 1 panda cory left. All the cories that died had a bit of fin rot. I had added Melafix and Primafix, but it was no use. The water parameter seems good. With the weather ...

Tried Melafix but is not helping... another cory died. But so far it only seems to be panda cories, none of my albino cories have died yet.

I live on the 2nd floor of an apartment and the room temp on certain days will reach 90F (it'll be better since I'm moving to a much better apartment in 2 weeks and summer will be over soon). I have already done 50% water change to lower the temp to 84F (over a period of 12 hours).

I'm new to the forum, but not new to the aquarium hobby.

About an hour ago I walked into my living room to find one of my panda cory doing the spiral of death swim. Upon closer inspection I see the cory's tail fin is nearly gone and where the tail and fin meet, there are red markings (looks like ...