Believe me, I'm far from an expert in anything, but I do have a 30 gallon tank with 3 Melanochromis auratus's and 2 Labidochromis caeruleus's (Electric Yellow Lab's) and have had no casulties. I know the Melanochromis auratus and the Labidochromis caeruleus swim the same waters and figured I'd give it a shot. Knock on wood, their have been no casulties yet, and all seem to note that the one auratus is the most dominent and seem to deal with it accordingly.