Planting my Tiger Lotus?

i just bought a tiger lotus from a pet shop and i bought it while it still is attached to its bulb or tuber i dunno what to call it though it already has tons of leaves maybe 15-20 leaves and lots of roots as well... so what do i do with it? do i just drop it in the tank substrate or should i plant it, if i shud plant it, how do i plant it? the leaves and roots out or all in the ground including the bulb? and how do i take good care of this plant? thanks! btw my tank faces direct sunlight....

Planting my Tiger Lotus?
Nymphaea lotus


(Tiger Lotus, Tropical Night-Blooming Water Lily, Waterlily, White Egyptian Lotus)





Culture: Space 4-6' apart in still water, avoiding fountains, waterfalls, and other moving water. Plant at the recommended depth, or plants may not flower. Propagate by washing off the soil and detaching a piece of rhizome with a vigorous growing point, potting it separately.





Soil:


Soil may range from sand to clay, with a pH of 7 to 8.5. Covering soil with small stones will reduce mud in your pond.





Sunlight:


Sun Exposure: Full Sun.





Temperature:


Minimum Temperature (F): Tropical water lilies require a minimum water temperature of 70°F., though established plants can tolerate a bit lower water temperature. • Cold Hardiness: 9a, 9b, 10a, 10b, 11. (map)





Landscape Uses:


Bogs. Water gardens. • Care: Remove flowers during the first year to allow the plant to establish. Before winter, move to the deepest ice-free part of your pond. If temperatures will drop below -40°F., remove from pond and store inside, in their pots, to a greenhouse pond with full sun exposure. Return to pond when water temperature reaches 70°F.





http://zipcodezoo.com/Plants/N/Nymphaea_...

Rubber Slippers