Water changes is right. If there is a chemical out there that does it I wouldnt use it I try to keep my tanks free from unnessary meds/chemicals in my tanks. Just my .02
B.K. I find this a quite interesting question, hope somebody can shed some light in it, as I remember hormones can be protein (amino acid) based or lipid based so supposedly can be adsorbed by activated carbon. UV radiation kills microorganisms by lisis (english spelling?) of nucleic acids, so MAYBE UV can destroy amino acid based hormones, don´t know about lipid based ones thou... somebody help please