The name Süsswassertang means “freshwater seaweed” in German, and is not a true aquatic moss. Often confused with Pellia, the Süsswassertang has a translucent green thalloid and feels like seaweed. The thalloids grows in a nice stratified pattern once established on hardscape. You can simply place Süsswassertang in the bottom of the tank or tie it to a driftwood/rock and watch it grow. Grows both in low and high light.
Süsswassertang is not a real moss and will never attach itself to wood or rock completely, it is a fern that thrives in the low light conditions. Then tied to wood it propagates itself by simply growing the clump larger.