I've been following the thread regarding eliminating roaches from septic systems. Last post was a year ago, and I was wondering if anyone has either found alternative solutions not already mentioned or are there any updates regarding what has already been posted; i.e. results, modifications, etc. Thanks for any and all responses. We need help. What we are considering doing right now is 1-have tank pumped; 2-have chemical products sprayed (bombs) into "empty" tank; 3-adding a chemical to prevent the roaches' reproduction. The tank was installed in 1969 and pumped when we bought the house in 2005. (Didn't know we had a problem at that time.)