OREGON FISH COMMISSION'S SALT-WATER SYSTEM 



139 



I prefer storage tanks as a source of 

 water supply. A tank has several ad- 

 vantages over a continuous-flow pump : 

 (1) better salinity control, (2) water re- 

 serve in case of pump failure, and (3) sed- 

 iment control. In an estuarine situation 



all tide and salinity phases. With a tank 

 you can pump during the high water when 

 salinity is greatest, thus holding salinity 

 at a level you desire. However, wood 

 tanks, if not lined with polyethylene or 

 treated, will be destroyed by marine boring 



a continuous-flow pump picks up water at organisms such as Teredos or Lhnnoria. 



712-029 O— 64- 



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