They appear to be similar to the payara in care - pretty open tank, with little to no structure for them to bump into. Lots of water movement and lots of dissolved oxygen. Looks to be a very messy eater, so large, frequent water changes would be a good idea, they don't seem too tolerant of poor water conditions. Looks to be a very skittish fish, covering the tank and perhaps the back and sides would likely help. This fish has been recorded up to 26", but looks like it could easily grow to 32" under the right conditions. They seem to be relatively peaceful fish, and adapt to aquarium foods pretty well.
I would imagine they are actually close to the indo-pacific tarpon in care, or the goliath tigerfish - I don't think I know of many people who have any kind of tigerfish that's over 3 feet or so long. The minimum tank size for a massive goliath tigerfish appears to be around 250-300 square feet, and round looks to be better than a rectangular tank. So I don't think many people are/will be successfully keeping this species privately
