In order to ensure the quality and safety of aquatic products, as well as to maintain the health of the aquaculture environment, regular testing of seawater quality has become particularly important.Testing indicators for seawater aquaculture include water temperature, salinity, pH, dissolved oxygen (DO), ammonia nitrogen (NH3-N), nitrite (NO2--N), and so on.This article will detail the key testing indicators and their standard values in marine aquaculture.
1. Dissolved Oxygen (DO)
Dissolved oxygen is a key parameter in assessing the ability of a water body to support life-giving activities.Adequate dissolved oxygen is essential for proper respiration of aquatic organisms.For marine aquaculture, the ideal concentration of dissolved oxygen should be above 5mg/L, or at least should not be lower than 4mg/L, in order to ensure the healthy growth of aquatic organisms.
2. Acidity and alkalinity (pH)
The pH reflects the acidic and alkaline nature of the water body and has a direct effect on the metabolism of aquatic organisms.The ideal range of pH for mariculture is 7.5 to 8.5. Too high or too low a pH value will have adverse effects on aquatic organisms, such as damaging gill tissue and affecting oxygen uptake.
3. Ammonia (NH₃-N)
Ammonia nitrogen is an important component of the nitrogen cycle in the water column and is mainly derived from the decomposition of feed residues and biological excreta.Excessive concentrations of ammonia nitrogen can be toxic to aquatic organisms and affect their growth and development.In mariculture, the concentration of ammonia nitrogen should be controlled below 0.2 mg/L.
4. Nitrite (NO₂-)
Nitrite is an intermediate product in the conversion of ammonia to nitrate.High levels of nitrite are also toxic to aquatic organisms and may lead to slow growth or even death.In the mariculture environment, the concentration of nitrite is recommended not to exceed 0.05mg/L.
5. salinity
Salinity is the total amount of dissolved salts in water, and for mariculture, the right salinity is essential for maintaining the physiological balance of aquatic organisms.Different cultured species have different salinity requirements, but the usual salinity range for mariculture is 28 to 35‰.
6. Temperature.
Water temperature has a strong influence on the metabolic rate of aquatic organisms.Water temperature for mariculture should normally be maintained between 15 and 30°C, with specific temperatures to be adjusted according to the needs of the cultured species.
Testing indicators for marine aquaculture are important tools to ensure the quality and safety of aquatic products and the sustainable development of the aquaculture industry.The above are some of the important indicators of marine aquaculture testing indicators and testing value standards, in addition to COD, total nitrogen (TN) and total phosphorus (TP), microbiological and heavy metal content can also be detected.The multi-parameter water quality analyser for aquaculture generated by WinRun Environmental Protection can meet a number of indicators for aquaculture testing, in line with national standards, and convenient testing.Online, portable and benchtop instruments are all available, with multiple options.If you need detailed information about the instruments, please contact customer service directly.
