Testing at several Ontario fish farms found no detectable therapeutant residues. Antifouling compounds are not used in Ontario on nets, to the best of the author's knowledge. Water quality testing must be limited to parameters of concern, specifically phosphorus, dissolved oxygen, and suspended solids. Testing should be carried out periodically during the ice-free feeding period. Every 6-8 weeks is adequate providing the period following turnover is tested.
Excessive testing is unwarranted and places an unreasonable financial burden on the farm.
Testing must not become a farm funded government research project. Introduction of Exotic Species Fish farms should never be responsible for introduction of new species into any waters. Fisheries managers, baitfish, ornamental fish, and transportation cause more than enough introductions. Fish should only be grown in waters where the species already exists in contiguous waters, or grown in a close system. The exception to this rule is where the introduction of the species would be considered desirable.