A question about water lilies.

Good morning gardeners,
I've just purchased a dwarf water lily,  the literature says a depth of 4" -8".  Another source says that if water lily leaves are under the water they will rot.  The two leaves (and one emerging) of the lily are short so the container is just below the surface.  Will this dictate how long any futurer leaves will grow and then stop growing?

Over to you water feature experts.  Cheers,  Tony.

Many thanks for that knowledgeabe anwer new shoot, many thanks,  Cheers,  Tony.