Detergent's effect on ...

Detergent's effect on freshwater ecosyetm

If the detergent enters in the fresh water ecosystem it will have a very poisonous effect on the aquatic life if the amount of detergent is above the minimum limit. All detergents destroy the external mucus layers that protect the fish from bacteria and parasites; plus they can cause severe damage to the gills. Most fish will die when detergent concentrations approach 15 parts per million. Detergent concentrations as low as 5 ppm will kill fish eggs. Fish can even stop breathing and will absorbs some chemical. These fish are not good for the human consumptions. At the same time the aquatic plans will also be in danger as the oxygen level will be lowered down.

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http://www.ehow.com/info_8294686_environmental-effects-detergent.html