Hello,
I'm setting up a 150 liter shallow-water Tanganyika tank.

It'll feature very strong light (metal halide); 10cm deep sediment
(0.5 - 1mm calcareous sand); strong to very strong water movement &
associated high oxygen level; high pH (about 8.5); "liquid limestone"
type hardness; and low nitrate and phosphate levels.

What plants would do well under such conditions? Vallisneria?