Sorry, here are the extra information... I have the tank for more than half a year now, and have been keeping the catfish (C. paleatus) and its friends for more than 3 months. It doesn't look like water parameters problem since no other catfish and other species are dying or sick in the tank for the ...

I have the same problem also. It happened to just one catfish. The other catfish are fine and lively. All other tetras in my tank are doing well too. It has happened for about one month by now. The "weird" catfish is able to eat and hunt for food when it "snapped" out from the "daze". Anyone knows ...