I have a Bangaii Cardinalfish that has not eaten for about 1 week. Our parameters were out of whack about a month ago (low ph, high salinity), but have been corrected and monitored closely. He has eaten less and less since the parameter issue. He now looks lathargic, and every once in a while he twiches for a second and floats sideways a bit. Other than that he has no physical signs of illness. Does anyone know what this is and what can treat it? We have a quarantine tank set up and can medicate if necessary.