Toxicants: l--salicylanil ide; 

 3--8-oxyquinoline; 



2--sodium pentachlorophenolate; 

 4--phenylmercuric acetate 



Temperature 18-22. Length of test 30 days (10-20 days for the bacteria) 

 Survival rate is indicated for 50% of individuals. 



^Biochemical Oxygen Demand 



160 



