I don't know the age and the length of your arowana, however, they don't compare to a Dempsey in demeanor. Dempseys are agressive at feeding time and most people don't feed them enough (imagine that - most overfeed fish). Dempseys are cool when it comes to environment. Arowanas jump, love caves and caverns, are carnervorous and suprise you whenever you think they aren't paying attention. As indicated, I don't know the length of the fish, however they are easily adaptable to a cold water condition (keep them in a feeder thank with guppies), but the obvious condition is that the fish will jump and go SPLAT. Change the tank like you do a comon goldfish or guppie tank (drop it down to 2/3 - 1/2, suck the gravel and add stress coat. You may want to add a pinch of aquarium salt just for good measure. Remember that arowana are prehistoric fish so nobody knows squat about them, but they seemingly continue to survive. Remind me of Pike in Jersey.