Help me identify this plant please? And a gravel question.

[cloudydays00]

I snagged some plants from my bro's little shrimp tank since they're starting to outgrow it...


Do I need gravel for this plant? It was half in the gravel/attached to something else in my brother's tank...

And if I don't need gravel for this plant, should I get some anyway? The main reason I don't want any is because I'm just paranoid about the tank being too heavy for the desk-shelf it's on. The tank is 5 gallons. There's some overgrown "Rotala Rotundifolia" and "Hygrophila Polysperma" as well but those seem to need gravel. It seems like it would be a pain to clean all the gravel... or do I not need to?

[Sena Hansler]

oh boy... I don't know what it is, but for stuff like my fern it does float and then attach. You don't NEED gravel for it...just something for it to make base an ornament, gravel, a rock, a plant...

[Mo]

It is Brazilian Pennywort It doesn't need gravel since it is a floating plant