OK guys! I really do not know what are wrong with my clown loaches right now. I have been changing the water and my stats are fine... But another loach passed away. Upon close inspection, he looked fairly healthy? The only thing I do know is that my thermostat went out and my temperature has been fluctuating a lot. I get a new one soon. Is this the culprit or is it something else (like fish TB), that have no symptoms that I can see? I am lost The last one that died his tummy was extremely fat. My temperature has fluctuated between 74-81 degrees F over 24 hour periods for a the past 2 days.