i find that my other piranha may have gotten the same disease as my previous one that died. Im not sure whether if it's just a injury from bumping too much on glass or not, but there r some white mark under my piranha's eye right on the cheek.it look similar to the injury of my previous piranha, which had the mark on its belly. gonna get water tested tommorrow. give me tips plz cuz i dont want to lose this one too.

