These should get you started:
http://www.seriouslyfish.com/species/lates-niloticus/
http://www.aquaticcommunity.com/mix/nileperch.php
As far as water parameters and feeding goes, the species is widely considered to be a generalist (hence it being labeled as a serious invasive species, and being banned in several countries). Standard low to mid range tropical temps will suit them just fine, and mid to high range pH is preferred. Feeding shouldn't pose many problems, as again, this species is considered a generalist. I know many aquarists struggle to wean smaller individuals off of live foods, but once that is accomplished, feeding is basic and straightforward. Pellets, cut fish, prawns and the like, will all be accepted.
I should note though, as I'm sure you're already aware, this species is capable of growing to incredible sizes, and is truly one of the largest freshwater species in existence. Even relatively
small specimens of 50-75 pounds, are well and truly beyond the care of most seasoned hobbyists. To grow one of these fish to its full genetic potential, a truly gargantuan system will be required, with equally scaled filtration and water changes. Not a fish for the faint of heart.