The 2020 Blagdon Affinity 50w Ice Vent Pond Heater. • Blagdon code: 1051545. Isle of Wight - PO30-41. These run at 50 watts, whereas most other heaters run at 150 watts. One Heater provides adequate venting for up to 5000 litres, add as many as you require depending upon the size of your pond.
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