Grizz Thanks for all your efforts. I am having similar problems (Septic tank over flows onto lawn). I am going to dig up my D-Box, use a clog-hog and add the sodium percarbonate to the drain field lines. I may also try to add the input baffle, but I will need to find/create an access for the input side (single chamber tank with access only on output side found). My question is do you have any thoughts to adding air to the leech field? My thought process is based on my understanding that Aerobic bacteria occur naturally in the field and boosting the oxygen content directly in the leech field instead of the tank may help Aerobic bacteria? Any thoughts? Again I truly appreciate your efforts.