i just put a blue dempsey and a electric yellow cichild .....the blue dempsey is kinda lazy....and isnt eating alot......plus theirs alot of guppies still left in from when i was cycling the tank....its like the fish i want to get the food dont activly go after it and the guppies eat it all before it gets to the bottom of the tank......i've had dempseys before but i dont really know to much about them...espically the blue ones.....and also i have a clown knife....any info on them