The red circled plant in the middle are Cyperus Haspan, they are pond/marginal plants... the cup shaped "leaves" are actually the emersed parts, it can grow underwater but they will mainly grow long stalks up to the water surface then grow the "leaves" above water. Maybe consider shifting them to the background.
Not sure of the red circled plants on the right side though... can't see it as clearly, maybe a close up photo of it might help.
Bookmarks