Pond Boss Forums POND CONSTRUCTION Creating habitat Pond vegetation

Some like the relatively shallow growing underwater floating leaf, longleaf pond weed aka American pondweed (Potomogeton nodosus). Left unchecked it can get pretty 'thick' with dense floating leaf mats from shore out to around 3-5ft deep. Does anyone see it growing deeper than 6ft??? The book says depth of growth is 6 ft but the plants often do not read the book. The eel grass in my pond has almost crowded out the longleaf pondweed. I planted the longleaf when the pond was new buy now after 14 years its occurrence is sparse.
http://www.outdooralabama.com/long-leaf-pondweed
http://www.thismia.com/P/Potamogeton_nodosus.html
https://gobotany.newenglandwild.org/species/potamogeton/nodosus/
http://delawarewildflowers.org/plant.php?id=1567

Long leaf pond weed is about the only Potomogeton specie that is commercially available.