Because of the fluctuating temperatures in this part of the country at this time of year - It is not uncommon for your pond water to be cloudy or green, even though you have your filter & aquatic plants. Be patient. Once the weather & temperature even out & it becomes sunnier & more consistent - Your aquatic plants can get to work filtering & your water should clear up just fine!
If you are looking to clear up your pond water immediately, Hoffman's Garden Center offers a variety of chemical additives, including Microbial AlgaeClean.
Want to learn more about how aquatic plants are essential in filtering your pond water? Click HERE