I got a 10" black arowana Wednesday 8/24 and he hasnt showed any interest in food yet. I have had arowanas before but they have always eaten within 24 hours. I have tried frozen krill, krickets, goldfish, pellets. Nothing has worked and they fed them all of these foods at the pet store i got her at. Shes in a 150gal with a odeo pike, red tailed payara, and a tarpon. How long should I be waiting before i start to worry?