introducing arowana to a pond/aquarium

Hi, I'm new here and new at keeping arowana but I'm planning on building a planted pond/aquarium of approximately 1400-1500 gallons 4.5m L x 1.2m W x 1m depth. I plan to intruduce maybe 5 juveniles (6-8in). There will be schooling smaller fishes such as tetras, danios, and barbs, some algae eaters such as SAE's and shrimp, and discus. I've read the following opinions and/or info on the web:

If you keep 5 aros or more together, they will spread their aggression,
If you grow the aros together, from juvenile, it's likely they won't fight as much
Growing aros with other species let's them get used to other fishes.
Putting a lot of hiding places will protect the smaller fishes (do plants count?)
Aros won't chase or eat fishes that are too small
Aros will avoid or won't eat schooling fishes
It's better to get bottom dwellers
Put the arowanas in the pond last so they won't feel it's their territory
Keeping them full on pellets will prevent them from going after smaller fish (no feeder fish)

Is there anyone who can verify or debunk this info? Thanks

Ok. Thanks for the reply. I've just seen alot of videos on youtube with arowanas with much smaller fish such as danios and tetras. The comments were that they were too fast for the aro or that there was safety in numbers. Does the sex of the aro make a difference?

Thanks for your advice. I'll probably scale back the number of of arowana to 1, just in case. I look forward to hearing about your 500 gallon aquarium. Will it be planted? what will be its depth? Are you going to put other species in it?

Is there a way to limit the size of an arowana? I ask this because 1. I don't want the arowana to outgrow the pondarium, 2. To let other arowanas catch up when I get them, 3. Maybe limit aggression? 4. Economic reasons: I don't want to spend too much on feeds.