Anubias Barteri Round Golden Coin LeafLive Aquarium Aquatic Plant The plant just need to be attached to a piece of driftwood or a rock with a twist tie, fishing line, or nylon string
That way they will slowly grow together overtime without overtaking each other
The roots systems of these plants are so versatile that they will wrap around and grow into whatever you tie them on to
They are pretty hardy and can handle varying conditions quite well