However, in Northern climates or in higher elevations, colder weather brings freezing temperatures that require special pond management techniques to help your pond make it through the winter.
Toxic gasses create a lack of oxygen in the water and cause the poisoning of living organisms.
Due to this lack of oxyen, fish and microorganisms have practically no chance of survival. The water enters through a hose, using very little energy, and is let out at the surface directly below the floating bowl. The warmth of the water is sufficient to keep a hole with a radius of approximately one foot ice free. This allows toxic gases caused by decomposition to evaporate. This aeration process helps ensure the survival of fish and microorganisms.