While most of the plant is grown out of the aquarium water, the roots in the aquarium water are absorbing "tons" of nitrates to support the large biomass out of the water. Naturally reduce your need for water changes, filtering and chemical treatments without taking up a lot of room in your tank.  Pothos is known as a great house plant for low light situations which is perfect for that cellar fish room your spouse makes you raise your critters.  Note however that the more light you give them the more variegated the leaves will become.  There should be about 4 or more rooted plants in the lot. 

Java moss loves to grow around the roots making it a perfect place for fry to hide, feed and thrive and give the tank a jungle look.