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Water Quality –
Important Concepts
• Water Chemistry
• Balance your System
• Water Source
• pH, DO, Nitrogens
• Temp, Alkalinity, Chlorides, Iron, Salinity
• Photosynthesis
• Nutrient Dynamics
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pH
• Hydrogen Ion Activity (0-14)
• Influences Other Parameters
• Base Additions
• Nutrient Supplements
• Compromise
• Tilapia Ranges
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Nitrogen Species
• Ammonia, Nitrite, Nitrate                                
• (TAN, NH3<->NH4, NO2, NO3, N2)
• Nitrification/Denitrification
• Acclimation Period
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Nitrogen Con’t
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Nutrient Supply for Plants
• Additions May Be Necessary
• UVI Lettuce Results
• EC Measures Strength
• Nutrients Continuously Replenished
• pH Interactions 
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Sources of Information
• Water Quality in Ponds for Aquaculture
• Water Quality and Pond Soil Analysis for 
Aquaculture
• Standard Methods for the Examination of 
Water and Wastewater
• Hydroponic Food Production
• Recirculating Aquaculture Systems