my parents have one of those septic systems that have some pump and agitator that requires electricity. has broken several times! they got it because we have a large family, lot's of folks/grandkids etc. using the toilets! never has backed up though, and now it just runs and they don't ever have to do anything to it. the water is clear, and was "approved" by whoever approves that stuff! also, my septic buddy told me never to use ridx because it can actually destroy the integrity of the concrete septic tank. said if you add anything, brewers/bakers yeast per month, one little package...if you add anything add all. but he said nooooo rid x. hope things work out well, sit down and enjoy a newspaper!! mark