Ok i have a 55 gallon with 8 baby mollies and 2 adults,2 guppys(both female), 1baby bristlenose pleco,1common pleco,3ghost shrimp,2 albino Buenos aires tetra,4 blue ram cicblids,1 albino rainbow shark,15white cloud minnows,1mystery snail,and 1 black khuili loach and i do a 25%water change a week. The weird thing about the guppy that died was it hid itself in a corner and tried to stay away from them