I had a good friend that had an awsome 16" Dovii in a a really big 55 gal tank and all it ate was hot dogs but they had to be Sabrett skinnless franks he wasn't taking any chances with that fish.
Ok, A top quality pellet like NLS is the best all around staple dite you can feed. Along with clean water adaquate filtration and enough space to live comfortably. The exact opposit of what I staeted above. Create a healthy environment and you will be rewarded whit a healthy fish.