Now the water plants in your pond are going on the decline rapidly. Growth has stopped, the leaves are turning brown and die off. The trees and shrubs in the garden let more and more leaves fall. This are signs of autumn. To prevent too much leaves from blowing and falling in the pond, a cover net should be stretched over the water surface. To this end you should use a fine-threaded and firm net, made of synthetic thread and stretch it as taut as possible over the pond.
Before applying the cover net you should remove as many died off leaves as possible and different organic material from the pond. In order to prevent acidification of the environment in the coming winter months you should spread a certain amount of Bio-Oxydator over the bottom. Besides you should install a freezing preventer or a good quality air pump, so that you keep part of the water surface open when it will be freezing.
The cold water makes the fish stay on a lower level in the pond water. As long as the water temperature is still over 5 °C, feeding may be continued. In this period the special Winter Fish Food is recommended. Do no longer introduce any new fish in the pond. The Pond Protector against herons can be stored until next spring.