I have a massive external filter for it just now which will be fine, but when I upgrade the tank I will more than likely have an sump for it.
The Asian arowana is my fav fish, my goal is to get a super red Asian arowana within the next few years hopefully. But that's big money. Even this fish am getting nearly cost me an arm and a leg lol.
Am going to get another tank in my room again, just duno what set up I want. Marine fish next I think. Crazy cool fish.
I've been looking on eBay and gumtree.
Just need to wait for the right one to come up.