Laguna Pond De-Icer The Laguna Pond De-Icer helps prevent pond surfaces from completely freezing over and allows necessary gas exchange that is essential for keeping fish alive in winter. The de-icer consists of a 14-inch high-density styrofoam float, a venturi valve for aeration and an extendable riser stem Recommended for temperatures down to-20 degrees celsius This product weight is 1.35-pound Measures 5-inch length by 14-2/7-inch width by 14-inch high