Transcript Water Testing For Aquaculture

Water Testing For Aquaculturre:
Objectives:
• To determine different ways of testing water
quality
• To learn what to test for when examining
water quality
• To get a basic understanding of how water
quality effects fish
Water Provides:
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Food
Oxygen
Excretory site
maintains body tempersture
pH:
• Most common test
• 0 to 14 scale with 7 being neutral, above
basic, below acidic
• Logarithmic scale
• Death points for fish are below 4 and above
11
Dissolved Gases:
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Oxygen
Carbon dioxide
Nitrogen
Ammonia
Hydrogen sulfide
Chlorine
Methane
Dissolved Oxygen:
• Is the primary oxygen source of
aquatic animals
• 5ppm is needed to avoid stress
• Temperature, light, algae, and
population effect levels of
oxygen
Carbon Dioxide:
• Highly soluble in water
• Occurs as a by product of respiration
• Interferes with animals ability to extract
oxygen
• Aerating water drives off carbon dioxide
Ammonia:
• Tested with kits
• Algae use ammonia for protein production
• Non-toxic to fish
Hardness:
• Determined by levels of calcium and
magnesium
• Effects production when at low or high
levels
Testing Methods:
• Colormetric- A concentration reaction
which shows a color that can be read off of
a scale
• Electronic- A electronic meter is used to
give readings of all tests
Web Sites:
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Www.was.org
www.aqua-in-tech.com
www.ansc.purdue.edu/aquanic/
www.aqua.ucdavis.edu/
www.ag.arizona.edu.azaqua
www.uidaho.edu/ag/aquaculture