Overturn
One complete cycle of top to bottom mixing of previously stratified water masses. This phenomenon may occur in spring or fall, or after storms, and results in uniformity of chemical and physical properties of water at all depths.
overturn The almost spontaneous mixing of all layers of water in a reservoir or lake when the water temperature becomes similar from top to bottom.
To achieve the proper depth, place them on overturned pots, bricks or cement blocks. Water lilies must have 18 inches to 23 inches of water in order to grow. Anchor oxygenating plants with pebbles in small plastic pots or cups.
overturn. a period when thermal currents and wind stir up a pond or lake, mixing the water thoroughly from top to bottom.
 See also: Spring, Solution, Organic, Organic matter, Site
  
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