UV-C water clarifiers for fresh, marine and pond water The sera UV-C Systems are universally usable and very powerful. They are suitable for use with ponds or aquariums. UV-C light is not present on Earth but comes exclusively from space. Accordingly, no organisms could adapt to this hard radiation during evolution, neither pathogens (bacteria, viruses, fungi), parasites nor dissemination stages of thread algae. This is utilized by UV-C Systems and improves the living conditions and the health of aquarium animals when being used during filtration. Bacterial water cloudiness and green water in ponds are effectively being suppressed.