This is a complete ecosystem jar with a prince of orange philodendron out of the top and Java Moss rock a piece of Chola wood with a piece of Buce attached and some purple root floaters at the top with one least killifish in the jar. Rotifers and fairy shrimp eggs have been added to the jar along with infusoria from the floating plants, and the moss for the fish to live off of. This fish can be sustained in this jar for at least six months without any additional feeding if not longer. The fish will provide fertilizer to the plant.