just give it time Kirk, the hurt does get better, it'll never feel the same, but you're the Aro King, I know you'll bounce back, everyone needs time to have closure and mourn. Pets are no different, especially for creatures so majestic as the beautiful Arowana.
My heart and prayers and with you, I guess I just feel a connection because you took Fu for me, it was obviously meant to be. He was born in the hands of the royal keepers of the Arowana's, he'll step up for you when you're ready.
God Bless-hang in there Mei