Sulphur, Sulphide, Sulphate And Fish

The HS bond length in hydrogen sulphide is $1.336\,\dot{A}$

$f_{res}=0.122\cfrac{c}{BL}$

$f_{res}=0.122*\cfrac{299792458}{1.336}*10^{10}$

$\cfrac{f_{res}}{10^{15}}=273.763\,Hz$

Sulphide HS Bond 273-763 Hz

This frequency will break hydrogen sulfide and produce hydrogen and sulphur.  But is sulphur alone poisonous to fish?  Sulphur is non-toxic to bluegill sunfish, rainbow trout, water fleas, and mysid shrimp, according a general search on the web.  And sulphate is relatively safe, it is in fish food.   Hydrogen sulphide is poisonous to human and fish.

Have a nice day.