Guppy Grass

Buy Guppy grass on Amazon (paid link):

Guppy grass is one of the fast growing floating plants popular in aquariums.
I've been growing Guppy grass in all my aquariums among other plants.
It looks nice, serves as natural filter for keeping my aquariums clean and my fish, snails, and scuds feeding on guppy grass.
Check videos on this page for more details.

How to grow Guppy Grass

Guppy grass aquarium garden