On Nov 18, 8:59 am, professorpaul wrote:
Bleach is nothing more than a solution of sodium hyperchlorite. It
frees up oxygen, which destroys the bacteria. Since sodium
hyperchlorite is pretty unstable, it eventually ends up as sodium
chloride, common table salt. In the quantities you use, it is not
going to do any harm at all. Go to it...

A related question is why is your sump pump hooked into your septic
system instead of just discharging somewhere above ground? Putting
excess ground water into a septic system isn't a good idea.