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PondXpert Greenstop 9000 UVC – 11 Watt
A pond UVC exposes your pond water to poerful UV rays. These rays cause the microscopic algae to floculate (stick together) – forming larger particles which sink to the bottom of the pond, get picked up by your pond pump and then get caught in the pond filter sponges.
This entry-level model is perfect for ponds up to 9000 litres (2000 gallons).