Laguna’s Fall and Winter Kit includes all the necessary products you will need for transitioning from the fall to winter water gardening season as well as for protecting and keeping Goldfish and Koi alive during the winter months. The Pond Netting keeps leaves and debris out of the pond, reducing the possibility of submerged circulating pumps becoming clogged. The Premium Spirulina & Wheat Germ Food is suited for spring and fall feeding, when water temperature is above 8 ° C (47 ° F). The Floating Thermometer has an easy-to-view window with large temperature indications for quick readings, while the De-Icer keeps and maintains a thawed, open area at the pond surface, allowing toxic gases from fish respiration and decomposing organic matter to escape. The De-Icer and Aeration Kit are energy efficient, easy to install, and suitable for garden zones 1 to 8 (-6 °C /20 °F).