Sad week...

So pH is still low... working on getting in a filter change so we can see what is goin on in there. I've realized that my cories seem to be fine except for one. Upon closer inspection during the QT I found he had on 2 barbels one of which is bent and the other is shortened. Today I woke up and found him lying on his side.... but still breathing... I believe he has just given up.. he no longer searches for food or swims for air...... :(