aro care

I recently got a baby black arowana in maybe 4 days ago? and I have him in a 20 gallon long because I feel like my 300 gallon is too big, and has bigger fish that could eat him , anyways, I've tried feeding blood worms, brine shrimp, live meal worms , baby guppies, flakes and pellets, and...

My baby arowana (5 inch) hasn't eaten since I got him last Saturday (4/28). He ate a cricket at the pet store the day I got him and he hasn't eaten since then. I have the water in his aquarium at 78 F. He is in there with a 1.5 inch pacu, 2.5 or 3 inch Oscar, and a 4 or 5 inch clown knife. They...