We moved into a 72 yr old home with a septic system about 9 years ago. Not knowing when the tank was last pumped we had it cleaned and continue to do so every 2-3 years. Just last year we noticed in the low area of the back yard excess surface water which smells like septic water. Do you think your product will help? My next question is how do I find my distribution box? My family consists of 2 adults and a 3 yr. old boy. Since my boy loves to plan in the dirt my wife does about 3 loads of laundry every 2-3 days. We have a water softner which back washes into the system as well. Are we over taxing the system? I was told by the septic cleaners that the tank is 500 gallons in capicity.