Effects of Dietary Clinoptilolite on Levels of Effluent Ammonia from Hatchery Coho Salmon

Abstract The addition of 5 and 10% clinoptilolite to the diet ofcultured coho salmon (Oncorhynchus kisutch) did not cause a significant reduction in effluent water ammonia concentrations compared to effluent water from fish fed control diets. Growth rate was not affected by the addition of clinoptilolite to diets.