You should un-bury the bulb, they tend to rot when buried. Those plants develop a huge root system, so be ready for it. Finally, trim any leave that break the surface. If you leave them the pland will convert to growing surface only leafs (which are thick and rubbery). Underwater leafs that hit the surface will soon wither/rot, so trim them too.
In my high light environment, I had a red lotus lily that put a leaf from sprout to surface every day. I finally pulled it and sold it at auction because it was too much work to keep it under control.