Pond weather-related cancellation for the weather-related cancellation of your pond, you can take advantage of what is known as the ice free farmers, across species and forms are available. Tangent, definitely not a hole in the ice, because it puts strong shock waves in the water and your fish as a result of stress can die. To create a Fraser 's, you can use hot water holes with an average of 5-10 cm. In the case of persistent Frost you must regularly check whether the wakken is already dichtgevroren. (see movie for more explanation) you can freeze your pond on a cheap way of combat, by an aeration device in the pond. This device makes the water movement, leading to oxygen bubbles in the water and carbon dioxide at the surface. Link the outflow, brick by brick, around 30-40 cm below the water surface. If you leave the outflow, brick by brick, láger, the lower layers of water, which in the winter months the warmst – unwanted mixed with the colder bovenlagen.   Another tool, that make your pond weather-related cancellation can be held, the oxidizing agent. The oxidizing agent is populated with the oxygen hydrogen peroxide. A catalytic converters in teentje ensures that the liquid is beginning to parelen, which slowly oxygen to the pond water release. One fill can be caused by a number of weeks, so that the most stringent vorstperiode can be bridged. You can also freeze your pond by the pond with shelves. This has the disadvantage that your fish in a few months ' time to spend with you in the dark, and the oxygen plants without light their work is no longer able to do so. If possible, use transparent plastic mesh, or bubbeltjes. Delete a layer of snow on your frozen pond as soon as possible. The more light, there are still in the ground is getting through, so much the better. Under the ijsdek, the pond is certainly not quiet activities. A number of algae, mosses and aquatic plants, such as needle Vulgaris, Elodea and crab-shaving-continue to be limited in winter. They shall ensure that, even under a thick layer of ice, oxygen production. This is of vital importance for the fish in your pond.