[Maryland Aquafarmer logo]
Issue 1997-02
Spring, 1997

Water Quality Issues in Aquaculture: Alkalinity

Figure 1  |  Figure 2

Dan Terlizzi, Water Quality Specialist



[Plot of daily pH]

Figure 1. Daily fluctuation of pH in ponds with low and high alkalinity.

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[Plot of relative concentrations of carbonic acid, bicarbonate and carbonate]

Figure 2. Relative concentrations of carbonic acid, bicarbonate and carbonate as they vary with pH. Alkalinity titrations proceed from around pH 11 and neutralize alkalinity until the endpoint is reahed. The end point using total alkalinity indicator is pH = 4.6 indicated by the dashed line.

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Maryland Sea Grant Extension Program
Phone Numbers And E-Mail Addresses

Agents and specialists of the University of Maryland Sea Grant Extension Program are available online through the following addresses:

Douglas Lipton
Coordinator and Marine Economics Specialist
 (301) 405-1280
 dlipton@arec.umd.edu
Vicky Carrasco
Coastal Communities Specialist
 (301) 405-5809
 vcarrasco@arec.umd.edu
Adam Frederick
Environmental Education Specialist
 (410) 234-8850
 frederic@mdsg.umd.edu
Andrew M. Lazur
Finfish Aquaculture Specialist
 (410) 221-8474, 8496
 alazur@hpl.umces.edu
Gayle Mason-Jenkins
Seafood Nutrition Specialist
 (410) 651-6212
 gmjenkins@mail.umes.edu
Don Meritt
Shellfish Aquaculture Specialist
 (410) 221-8475
 meritt@hpl.umces.edu
Tom Rippen
Seafood Technology Specialist
 (410) 651-6636
 terippen@mail.umes.edu
Jackie Takacs
Marine Agent
 (410) 326-7356
 takacs@cbl.umces.edu
Dan Terlizzi
Water Quality Specialist
 (410) 234-8837
 dterlizz@umd.edu
Don Webster
Marine Agent
 (410) 827-8056 ext. 127
 dwebster@umd.edu
Denise Wist
Administrative Assistant
 (301) 405-6935
 dwist@arec.umd.edu

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The MARYLAND AQUAFARMER Newsletter is produced quarterly each year by the Cooperative Extension Service, University of Maryland, College Park with support from the Maryland Sea Grant College Program and is issued as a public service for the aquaculture industry. Annual subscriptions are free of charge.

Aquafarmer Editor
Maryland Sea Grant College
4321 Hartwick Road, Suite 300
College Park, MD 20740
(301) 405-7500
Email: aquafarmer@mdsg.umd.edu

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Last modified June 21, 2002

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[Maryland Sea Grant]
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 [University of Maryland Extension]
Issued in furtherance of Cooperative Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, University of Maryland, College Park, and local governments. Thomas A. Fretz, Director of Cooperative Extension Service, University of Maryland, College Park.
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