i have had african cichlids for many years with no problems of diseases etc. have had them die from power outages. but i brong home some new fish to a aquarium that stressed them or gave disease probably the disease because they are all dead but a few and i have had many for 4 years or so. they are not eating and they have no apearance of any external paracites. i have a 100 gallon tank and i have lost over 500$$$ in fish very rappidly. please please give some feed back on what i can do. hurry down from many fish to five an only two eating