It is better to not run grey water through septic system, unless you have no way to get rid of the grey water.
Need to keep in mind about all the less than great stuff that could come from detergent and clothes. Kitchen sink should go to septic due to greases.
Instead of RidX, dump in a shovel or 2 of fresh horse do into the john now and then. Its got the right enzymes.
Huh. Wow. Living in the rocky Hill Country, septics are pretty common. OK, now the gross question: do septic tanks handle feminine products pretty well?