Identity of umbrella-like plant at polyart

[fishlearn]

Hi guys,

Recently I went to polyart aquarium to take a look, and saw a rather nice plant in their display tank.
It is planted on the side of the display tank, and has an umbrella like shape.

Seeing that it was quite interesting, i bought 1 small pot of it home.

Now i'm trying to find out what exactly did i buy.

Can any bros help identify what plant is it?

Also, this plant has grown rather tall in the tank. How do I do gardening on it? Do I just snip off the top parts?

Thanks.

[Neondagger]

Sounds like cabomba. You need photo for us to Id. Cabomba can just snipping off the replant or throw away