JBL ProCristal UV-C Compact plusUpdated compact UV C water clarifier from JBL fights against water cloudiness, free floating algae, and pathogens in the water column for higher quality water environment which reduces chances of infections. Key Features Crystal clear and healthy water: water clarifier for the quick and efficient elimination of greenish and whitish cloudiness in freshwater and marine aquariums and in garden ponds Space saving assembly: connect to external filter or