She knows without any prompt, the importance of looking after the delicate balances of the eco systems - preserving the quality of the water, cleansing the discharge, preventing pathogens. Nature knows the rules - and the consequences. In this environment there are no pesticides, or heavy metals. And no diseases. At Mt Cook Alpine Salmon we source our gene pool from the wild. We keep our fish densities lower than best practice, and we avoid any use of antibiotics and chemicals. These natural sustainable practices meet or exceed the tight government regulations in New Zealand as monitored by the Ministry for Primary Industries, Department of Conservation and Environment Canterbury.