And of course you are pre-planning the eventual size of 2-3 feet long.
A thought would be to let the freeze dried foods soak for a short time in some tank water. So it doesn't cause any issues in the digestive tract, sucking up a big dry cube of worms.
As well as defrost a few minutes too if ever to use frozen. I know I hate getting a brain freeze,
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Arowana have always been a beautiful fish to watch in a tank. I hope the raising of the fish goes well.
Do you have previous experience in keeping fish?
The article in my signature talks about a bunch of important things to know.
One of the most important is about the nitrification cycle. Having a happy growing beneficial bacteria is the critical issue in keeping a stable tank and your fish alive.
Also make sure to get a liquid test kit (if you do not already have one) so you can keep track of the water parameters. Especially when a tank is new, and when there is a baby /very young fish requiring many feedings.
Having left over foods rotting on the bottom is a frequent concern. Do you have any bottom feeders to help with the clean up?