The Pest Animal Co-operative Research Centre has found the carp cause almost $16 million damage to our rivers each year.
Charlie Carp Fertilisers expects to remove about 250 tonnes of the pest fish from the Murray Darling Basin this year.
Managing director Harold Clapham says there's plenty of scope for the business to expand.
"We started developing a fertiliser that we sold in retail packs.
"In the last 18 months we've gone down the track of getting our organic certification.
"The plan is to significantly expand the commercial operations.
"This year we would have sold at least two container loads of product overseas, and hopefully we can develop that as well."