7 Watt PL-S H Type UV-C Germicidal Bulb. Greenwater or single cell algae problems in Water Garden Ponds can be eradicated using a UV light clarifier. UV-C light germicidal Ultraviolet lamp or Ultraviolet UV Germicidal Bulbs help control the growth of algae. The increased water clarity improves fish viewing and it also improves the health of the fish. PondH2o 7 Watt PL-S H Type UV-C Germicidal Bulb works to clear your pond or aquarium water by removing unsightly green algae. The strong ultraviolet light breaks down the algae in the water.
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