What is another word for slow sand filter?
Pronunciation: [slˈə͡ʊ sˈand fˈɪltə] (IPA) 
A slow sand filter is a type of water filter that uses sand as the filtering medium. However, there are several other synonyms for this filtration system. One popular synonym is the biosand filter. The term "biological sand filter" is also used to describe this type of filtration system, as the sand bed contains beneficial bacteria that help break down and remove impurities from the water. Another synonym is the gravity-fed sand filter, which refers to the fact that water flows through the sand by gravity alone. Lastly, some refer to this system as simply a sand filter or a sand bed filter, as the sand is the primary filtering mechanism.
