The Laguna PowerHeat De-Icer provides a critical environmental control tool for ponds where a pet and property owner needs to keep the water from icing over potentially killing off the fish inside. This product works particularly well for ponds and small bodies of water that are reaching temperatures of 20 degrees Fahrenheit. The Laguna De-Icer utilizes a 15-watt heating element to break down snow as it makes contact. This feature stops the De-Icer from becoming buried in snow itself. In the meantime the unit can keep function performing a necessary gas exchange in the water so that fish aren't deprived of their oxygen. A simple clear LED light provides a quick indication when the unit is operating as designed. Further the safety features of the device automatically turns the Laguna De-Icer off if there is a problem. This prevents burn out and electrical problems. To recap the benefits of the Laguna PowerHeat De-Icer helps with the following: ? The De-Icer continues gas exchange in the pond helping the fish inside. ? The safety features on the De-Icer unit prevent it from over-heating or burning out due to a malfuction of some sort. ? The unit protects itself with a built in heating element that makes it impossible for snow to build on up on the unit. ? The features of the unit prevent icing over near the element as it sits in a pond.