News features and technical articles about the evolution of aquaculture, one of the world’s fastest growing industries.



What is the best carbon-nitrogen ratio for biofloc systems?

A recent study at the Federal University of Rio Grande in Brazil showed that it is possible to reduce the C:N ratio in biofloc cultures, to decrease the water volume used and the total suspended solids produced, with resulting savings. 

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TAN, other water quality factors affect nitrification rates in biofilters

An important criterion when studying biofilters is the conversion rate of total ammonia nitrogen (TAN) to nitrate-nitrogen in production water. Although nitrification rates have been based on media surface areas, they do not always reflect the actual nitrification achieved. Volumetric 

Health & Welfare

Beneficial microbes and pathogen control

A range of alternative products is available to improve animal health and water quality, and control pathogen loads. Beneficial microbes produce antimicrobial compounds and suppress pathogen proliferation. 

Health & Welfare

Product improves nitrification in RAS

Healthy populations of both ammonia- and nitrite-oxidizing bacteria must be present in aquaculture systems to support the nitrification of potentially toxic ammonia to nitrite, with further oxidation to less problematic nitrate. 


Nitrification rates in fluidized-bed filters

Study evaluates nitrification rates of three fluidized-bed filters, finding no significant changes in fluidization level as biofilm accumulated or was sheared off.