Effect of DBS detergent on oxygen diffusion out of and into water with no or 9‰ NaCl was tested. Concentrations of detergent used were 5; 50 and 250 mg/l SA. Oxygen content was measured after 24 h by the Winkler′s method; in observations up to 10 days oxygen pressure was measured with Plastomed 305 apparatus. There was no direct effect of detergent present in water on its oxygen content no matter it there were carp juveniles or no fish at all.
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