I've eaten Jack Dempseys, managuenses, Petenia spendida, Tilapia buttikoferi all from my tanks. Jack had a swim bladder problem, Petenia an eye infection, can't remember why the others, but better than letting them suffer, and chucking them into the trash. And I only use salt as a med, it only adds to the flavor. If you go to a market in Saigon, it's full of baskets with gouramis, barbs and plenty of others to eat, you'd recognize from your tanks, and in certain parts of Mexico, the fish markets are full of cichlids, such as Vieja, Herichthys, snook, etc.