Water Quality Instruments Aquaculture.pdf

water quality parameters, instruments used their description and uses

1. Comprehensive List of Instruments Used for Measuring Water Quality
Parameters in Aquaculture Systems
Physical Parameters
Parameter Instrument/Equipment Description/Use
Temperature Thermometer / Digital Thermometer / Temperature probe Measures water temperature, crucial for fish metabolism and DO levels.
Transparency / Turbidity Secchi Disk / Turbidity Meter / Nephelometer Indicates water clarity and suspended solids.
Salinity Salinometer / Refractometer / Conductivity Meter Determines salt concentration in brackish or marine systems.
Electrical Conductivity (EC) Conductivity Meter Measures ion concentration; correlates with salinity.
Total Dissolved Solids (TDS) TDS Meter Indicates dissolved substances in water.
Water Level / Depth Water Level Indicator / Depth Gauge Helps monitor pond or tank depth.
Chemical Parameters
Parameter Instrument/Equipment Description/Use
pH pH Meter / Portable pH Pen / pH Test Kit Indicates acidity or alkalinity of water.
Dissolved Oxygen (DO) DO Meter / Winkler Titration Kit Essential for respiration and aerobic decomposition.
Carbon Dioxide (COn) COn Test Kit / Titration Apparatus Measures free COn levels affecting pH and fish health.
Alkalinity Titration Kit / Digital Alkalinity Meter Indicates buffering capacity of water.
Hardness EDTA Titration Kit / Hardness Meter Important for osmoregulation in fish.
Ammonia Ammonia Test Kit / Ion-selective Electrode / Spectrophotometer Toxic at high levels; produced from excretion.
Nitrite Nitrite Test Kit / Spectrophotometer Intermediate in nitrogen cycle; toxic to fish.
Nitrate Nitrate Test Kit / Spectrophotometer End product of nitrification; indicator of organic load.

2. Phosphate Phosphate Test Kit / Spectrophotometer Indicates nutrient enrichment.
Sulfide (HnS) Sulfide Test Kit / Gas-sensing Electrode Detects toxic hydrogen sulfide in anaerobic sediments.
Biological Parameters
Parameter Instrument/Equipment Description/Use
Chlorophyll-a Fluorometer / Spectrophotometer Measures algal biomass.
Plankton Density Plankton Net / Microscope Evaluates productivity and feed base.
BOD BOD Incubator / BOD Bottles Measures oxygen used by microorganisms.
COD COD Reactor / Spectrophotometer Indicates total organic load.
Microbial Load Incubator / Colony Counter Determines bacterial contamination or biosecurity level.
Advanced/Integrated Instruments
Parameter Instrument/Equipment Description/Use
Multiparameter Meter YSI / Hanna / Horiba Measures pH, DO, EC, salinity, temperature, and ORP simultaneously.
Spectrophotometer / Colorimeter Analytical Instrument For precise quantification of chemical parameters.
Ion-Selective Electrode (ISE) ISE Analyzer Measures specific ions like NHnn, NOnn, Cln.
Remote/IoT Sensors Real-time Monitoring Systems Continuous water quality tracking via cloud.
Portable Test Kits Field Reagent Kits Handy for on-site monitoring.