Pond Systems.  (Unknown date).  Water Testing.  Pond Reflections, The Pond Systems Newsletter.  Retrieved October 2, 2008 from the internet: http://www.pondsystems.com/testing.html

 

Fried, S., Mackie, B., Nothwehr, E.  (2003).  Nitrate and phosphate levels positively affect the growht of algae species found in Perry Pond.  Retrieved October 2, 2008 from the internet: http://www.grin.edu/academic/biology/cera/tillers/volumefour/includes%5C5-TlrsV4.pdf


Schramm.  (1997).  The Oxygen Factor (in ponds).  Retrieved October 1, 2008 from the internet:

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