OASE IceFree Thermo 330 watt pond heater and ice preventer. Keeps an area of the pond surface free of ice in temperatures down to -20C. The IceFree Thermo 330 is composed of a buoyant polystyrene float and a metal heating rod element that creates and maintains a more tolerable environment for pond fish in freezing conditions.Ensures a permanent ice-free zone on the pond surface allowing crucial gas exchanges to occurMaintains the warmer temperature zone on the pond floor in winterFeatures integrated frost monitor which activates unit only in potentially freezing conditions
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