<prompt> Translate the following text to EnglishMaji ya kuyeyusha yanayotumiwa katika vipimo vya sumu ya maji ya kutiririka yatategemea malengo ya utafiti na vikwazo vya vifaa, kama ilivyoelezwa katika Sehemu ya 7, Maji ya kuyeyusha.  <response>: The dilution water used in effluent toxicity tests will depend on the objectives of the study and logistical constraints, as discussed in Section 7, Dilution Water. 