Thank you. The tank is 96x48x30. 535 gallons measure internal dimensions. 125 gallon sump and an Ultima 2000 pond filter. That is a silver aro in there.Sweeeeet! That's pretty much exactly what I would love to build for my black Arowana / Uaru setup. Right now they're babies but they'll grow up fast.
How many gallons and what dimensions does your tank have? Filtration?
It's a bit hard to tell from the pic, but is that a silver Arowana?
ETA: The plants up on top are a wonderful idea. My Uarus are like little Salad Shooters with most aquarium plants.