My Silver Arowana, All he eats is krill, everytime I put something else in there, he chomps it, spits it out and wont eat untill I put krill in there, I try several types of food, all he likes is krill, I dont think that is a good diet, he is only 3" any other ideas, should I even try to start feeding him different food or what? I am just not sure. List some food, brand names and whatnot ill go purchase and see if he likes. List brand names type of food ect. I will run down to petsmart and buy.