Aquascape pond aeration kits are ideal for winter use. They create much-needed oxygen for your fish and help to leave a hole in the ice for proper gas exchange. The included braided tubing in the Pro Air 20 and Pro Air 60 Aeration Kits are freeze-resistant, guaranteeing functionality in even the harshest climates. Depending on pond size, either kit is ideal for counteracting the depletion of oxygen caused by decaying debris.