i have a young australian about 4 inches long in a 55 gallon tank. The water is fine ive change the water not too long ago. After this one night i fed it guppies, the next day wen i tried to feed it guppies again he didnt eat them. So i left the guppies in the tank over night and the next day the guppies were gone. Then tonite i tried feeding it sumthing else, its not eating again. . . i dont know if all of a sudden he just got used to eating in the dark or what? Cuz it worries me that hes not eating normally. 
