This is a complicated subject far out of reach from the laymans understanding... The metabolites of certain pharmaceuticals as excreted by the human body and then further metabolized by bacteria and plants and fish... well... let's just say the term impossibly-interdisciplinary comes to mind. I don't know if you could get that many PhDs, PharmDs, MDs, to meet in a room to discuss aquaponics.Originally Posted by Basil1