1. Water Testing For Aquaculturre:

2. 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

3. Water Provides: Food Oxygen Excretory site maintains body tempersture

4. 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

5. Dissolved Gases: Oxygen Carbon dioxide Nitrogen Ammonia Hydrogen sulfide Chlorine Methane

6. 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

7. 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

8. Ammonia: Tested with kits Algae use ammonia for protein production Non-toxic to fish

9. Hardness: Determined by levels of calcium and magnesium Effects production when at low or high levels

10. 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

11. Web Sites: 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