Nope Silver Arowanas get way too big for a 5 foot - growing to about 2 foot as adults sometimes bigger. Even for a Jardini I would be looking at a 7x4x2 as a minimum or a 6x2x2 at a real push while they grow.
My LFS Maidenhead Aquatics in Taunton had a 3ft Silver Arowana in there 8x4x2 tank and they said thats how big they all get, so deffo not in anything under 8ftx 4ft wide
My LFS Maidenhead Aquatics in Taunton had a 3ft Silver Arowana in there 8x4x2 tank and they said thats how big they all get, so deffo not in anything under 8ftx 4ft wide