Goodbye blanket weed. The Blagdon Electronic Blanket Weed Controller, will provide long-lasting effective control of blanket weed in ponds. Maximum pond size 23000 litres (5060 gal). Mains powered with 3m of cable. Multi frequency processor ensures continued success. Very low running costs 1.6 watt. Flashing active frequency indicator light. Integrated wall or post mounting bracket. Easy to install. Two year guarantee.