Java Moss
Java moss grows relatively in any water conditions and needs occasional trimming once it is settled or established. It reproduces readily that is why regular trimming is needed. You can find them in Southeast Asia.

Water Sprite
This plants can be grown floating or planted and can tolerate soft acid water. It is light green in color and very versatile, may grow fast under bright lighting. Water sprite easily multiplies and continues to grow but lives shortly. Mature leaves just die and disintegrate. If you plan to plant water sprite in your substrate make sure to exposed at least one inch of its roots otherwise it will just gradually rot.