Destratification is a process in which the air or water is mixed in order to eliminate stratified layers

Lake stratification

Lake stratification is the separation of lakes into three layers:# Epilimnion - top of the lake.# Metalimnion - middle layer that may change depth throughout the day.# Hypolimnion - the bottom layer....

 of temperature, plant, or animal life. The first example of destratification was in 1919, in a small resorvoir.

A pond

Pond

A pond is a body of standing water, either natural or man-made, that is usually smaller than a lake. A wide variety of man-made bodies of water are classified as ponds, including water gardens, water features and koi ponds; all designed for aesthetic ornamentation as landscape or architectural...

's condition deteriorates when the bottom environment

Benthic zone

The benthic zone is the ecological region at the lowest level of a body of water such as an ocean or a lake, including the sediment surface and some sub-surface layers. Organisms living in this zone are called benthos. They generally live in close relationship with the substrate bottom; many such...

 cannot support animal life. The bottom is the area that runs out of oxygen first, it is where the most oxygen is used, and it is the farthest from the surface where it is replenished. Without oxygen a lake or ponds self-purification capability is not only reduced, it is reversed. The small animals, snails, worms, bacteria, etc., which help keep a pond clean cannot live, and the pond's nutrients are then recycled from the sediment

Sediment

Sediment is naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of fluids such as wind, water, or ice, and/or by the force of gravity acting on the particle itself....

. This forms a layer of muck

Muck (soil)

Muck is a soil made up primarily of humus from drained swampland. It is known as black soil in The Fens of eastern England, where it was originally mainly fen and bog. It is used there, as in the United States, for growing specialty crops such as onions, carrots, celery, and potatoes...

 at the bottom which serves as a fertilizer for weed and excessive algae

Algae

Algae are a large and diverse group of simple, typically autotrophic organisms, ranging from unicellular to multicellular forms, such as the giant kelps that grow to 65 meters in length. They are photosynthetic like plants, and "simple" because their tissues are not organized into the many...

 growth. It can also cause large fish kill

Fish kill

The term fish kill, known also as fish die-off and as fish mortality, is a localized die-off of fish populations which may also be associated with more generalised mortality of aquatic life...

s.

External links

• http://www.clearpond.com/docs/articles/pond-health.php
• Thermal Destratification in Buildings Thermal destratification in buildings
  Thermal destratification in buildings
  Thermal destratification is the process of mixing the internal air in a building to eliminate stratified layers and achieve temperature equalisation throughout the internal space...