At a water temperature of 40°F, test water for high ammonia and nitrites, and begin adding necessary water treatments, such as a Sludge Remover. Place the pump back in your pond; run for a few hours while checking on performance, ensuring there are no leaks.
If using an Aerator during the winter, leave it in the pond to continue oxygenating the water all season.
At a water temperature of 50°F, begin feeding fish a low protein food.
At a water temperature of 60°F, begin feeding fish regular food and add tropical plants. If necessary, perform a 50% water change. Always use Chlorine Remover when introducing tap water to your pond.
At a water temperature of 72°F, begin fertilizing plants.