In most published experiments related to constructed wetlands and filtration, scientists conduct the experiment at the locations near where the wastewater is being discharged, such as in lakes and river basins near the site of wastewater discharge. This condition will make wastewater constantly flow through the filtration site along with natural factors such as the sun, wind, and other animals which will impact the water quality being filtered by the macrophytes in those filtration sites. In this experiment, there will be a natural wastewater sample taken from the Drunken Moon Lake located in the National Taiwan University. This means the macrophytes used in this experiment will be filtering non-flowing water rather than flowing water, which will make the amount of Dissolved oxygen and contaminants in the water less compared to flowing water, which will potentially have an impact on the number of contaminants that the macrophytes will be able to filter out and will improve on the findings of other researchers in this field. Moreover, in previous experiments done by researchers in this field, the Typha that was used has leaves on the Typha, which will allow it to perform photosynthesis and have a stronger and more developed root system and plant tissues. However, the Typha used in this experiment does not have leaves, meaning the filtration by the root system and the plant tissues of the Typha will not be as strong compared to the Typha with leaves, which will be determined in this experiment. Furthermore, the Pontederia crassipes are considered as a novelty in constructed wetland experiments, which will make the findings of this experiment critical to the use and effectiveness of Pontederia crassipes in a constructed wetland.