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Nutrient management in barramundi ponds


(not documented)

Project lead


(not documented)




On-ground work

Case study type


Funding source

Good Fortune Bay Fisheries

Funding amount


In-kind contribution

(not documented)

Start date

20 July 2018

End date



Diatomix has been used to reduce ammonia and nitrate levels in ponds on a freshwater Barramundi Farm.

Funding amount for this project is provided on an annual basis.


Reducing concentrations of ammonia, nitrate and orthophosphate is associated with the reduction in both blue-green algae and macrophyte weeds such as Cabomba. This greatly assists in reducing operational time to manage weeds as well as improve water quality for growing fish and avoiding poor flavours in fish flesh.


The management of nutrient levels requires consistent monitoring in biological systems carrying large biomass of farmed fish.  Unlike wastewater systems that are generally consistent, the growth and feed rates of fish alter the profile of ammonia and nitrate in the water and weekly monitoring of these values ensures that the dose of Diatomix is optimal and therefore continues to reduce these levels.

Reference ID


Last updated: 20 September 2018

This page should be cited as:

Department of Environment, Science and Innovation, Queensland (2018) Nutrient management in barramundi ponds, WetlandInfo website, accessed 18 March 2024. Available at:

Queensland Government
WetlandInfo   —   Department of Environment, Science and Innovation