nymphoides, hydrocharis for pond

Hello underwatner gardeners,

I'm planning to plant some false lilies (Nymphoides peltata) or frogbit
(Hydrocharis morsus) in a big tub on my balcony (hopefully with a few
goldfish). From my research either species are native to or have been
naturalized in temperate climates (like the one I live in) so that's
settled. Anyone had experience with those plants? It seems they aren't
too hard.
You can probably see I'm going for plants that look like lilies! But I
can't use real lilies, if I want to plant in a tub.

Seb