Hydor Koralia Photo-Electric Cell Part # JH1901 Power Heads PondMaster 20 watt Replacement UV

PondMaster 20 watt Replacement UV Bulb Part # 12972

Works with the following Octopus Stock Skimmer Pump - Aquatrance 1800S

802 Power heads

12 or 14 hour light cycle

Aqua-Supreme 530 GPH Magnetic Drive Submersible Aquarium Pump Part# 6533

Hydor Koralia Photo-Electric Cell Part # JH1901 Power Heads PondMaster 20 watt Replacement UVThe Hydor Koralia Photo Electric Cell plugs into the Hydor Wavemaker and is used to slow down the circulation pumps controlled by the Wavemaker during the night hours. When the aquarium lighting system turns off the Photo Electric Cell senses the reduction in light and signals the Wavemaker to slow the pumps down to minimum power also restore to normal circulation when aquarium lights cycle on.