Sorry to hear about the fish, may it rest in peace. Please try to persuade your dad not to buy another one. Read up on some of the articles on this site about cycling, then you could keep a small community tank with a small school of neon tetras that you like.
Watermelon: Mate, I'm not trying to pick a fight or anything.
I'm fully prepared to accept that I am wrong, as soon as someone comes along with evidence that baby arows eat live food while their egg sack is still attached and full. I'n not suggesting that they starve themselves, the egg sack is full of yolk, yolk is highly nutritious, lots of protein and iron i believe. I'm assuming that the yolk is steadily absorbed into the body, thus the fish needs no other food while still feeding on the egg sack.
several still showed yolk sacs.
I draw your attention to this particular section. The word several, to me, indicates that only one or two of the fish still had their egg sack. I would think that the ones without egg sacks would be eating the feeders, and once the other couple of arows depleted their egg sacks, they would start to eat the feeders too. So you see this does not prove that arows with egg sacks eat other food, thus there is no disagreement between me and this professional.
I'd appreciate any information anyone might have on this subject.
Sorry for the off-topic everyone.
EDIT: Whoops, you posted again while I was writing.

hey man no hard feelings, we're all here to learn. Did you manage to find some other information? If so, please post a link or something, I'm quite interested in this area.