Join Date: Jun 2013
Location: Gilbert, Arizona
The corkscrew Vals will get quite long and spread through most of your water feature, I don't see it as a great plant, but if that's what you're after then go for it.
Moneywort is one of my favorite plants, but it doesn't spread and hide things very well at all, it would be a great thing to have in a couple clumps of 3 of 4 stems. It grows out of the water like nobody's business, and it grows fast (especially in shallow areas like yours).
I'd go with some small carpeting plant that doesn't need too much work (and doesn't get too tall), like Dwarf Hairgrass, to make a really nice carpet for the fish to hide in. Another carpeting plant that I enjoy in my shallow water zone thing is Pygmy Chain sword, it's just great.
People are too often merely stating an assumed truth from flawed observation.