I checked on all my fish this morning (a bn pleco & 3 panda cories) and they were fine. This evening I was about to do a water change and noticed that my bn girl was laying upside down over by a plant and turns out she was dead
I took her out and put her in a different container to get some pictures, she appears to have some white spots on her. The other three cories are doing fine, any ideas on why she died?
0 ammonia, 0 nitrites, about 40 nitrates