NorthFin Premium Fish Foods does not use any preservatives or harmful chemicals to preserve its pellet line.
Northfin is using very special Antarctic Krill. Yes Antarctic Krill that is flash frozen and shipped to Canada (Preservative free). The krill is then broken down (water, oil and solid material). Which are then dried and shipped strait to Northfin (Preservative free). The Krill is USDA, CFIA and EU Category 3 approved.
Whole Herring/Sardine meals that Northfin gets is preserved with Naturox and is USDA, CFIA and EU Category 3 approved.
Here is the test results of the Krill meal and finished products: