I have been on a septic tank for my whole life...64 years and I use bleach whenever I want....in whites and towels, especially. No harm done. We have our tank pumped every 3 years,as recommended. The pumpers never mention any problem.
[QUOTE=KalamaQuilts;5853457]Just a note, if you have a septic tank please don't do this, it kills the bacteria that breaks down what comes into it.