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| Dirty pool water. | 
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| Ciliates (Protozoans) found under the microscope. | 
The small pointed rod-shaped items are Ciliates, a group of Protozoans characterized by the presence of hair-like organelles called cilia on them. The image above was captured using a 2 mega pixel  monochrome Lumenera Infinity 2-2 CCD microscope camera.
 
