Mercury

4) The sterilization of high-concentrationed cationic
sufactant can make demages to the aquactic
microorganizm communities.
5) The strong dissolving capacity of detergents
toward unctuous matters can damage the
gustatory organ of fish, thus depriving them the
ability to avoid toxicant matters and look for food.
It’s reported that fish can not survive in water
with detergents at a concentration of over
10mg/L.