Aquascape stainless steel Pond De-Icer is ideal for keeping a small hole opening the ice during cold winter months, and insures proper gas exchange helping keep fish alive during the winter.
It is important to leave a small hole open at the surface of the pond allowing for necessary gas exchange. In extreme conditions or gardening zones above USDA zone 5 we recommend the deicer be used in conjunction with an Aquascape pond aerator.