I have a male agassizii "blue" that has started to become very lethargic, almost complete loss of appetite and stays in dark dress all the time.. I see no visible lesions or fungal growths, nothing abnormal to be exact.. and every other tank inhabitant seems perfectly healthy, so im at a loss.. no clue.. can anyone help? dont want to lose him..( blue agassiziis are probably my favorite apistos)