Chemical
Antimony was obtained from Sigma (Louise, MO, USA) as antimony potassium tartrate (APT, C8H4K2O12Sb2 · 3H2O, ⩾99.9%) and used without further purification. Stock solution of APT was prepared in distilled water. Stock solution was diluted to obtain suitable concentrations of APT in dechlorinated tap water, embryo rearing solution, moderately hard water (MHW) medium of USEPA (2002), and algal medium for fish, fertilized eggs, planktonic crustacea, and green algae, respectively.