Our ??Perfect Climate?? line has ??reinvented the wheel?? when it comes to keeping ice-free water available in winter ponds. Safe in all ponds and can be used as a floating de-icer out of the box or in seconds converts to a submersible de-icer! In the past, all that was readily available were energy gulping 1000 watt to 1500 watt de-icers. MET listed.?