Septic
Failed 50-year-old septic drain field back to full flow in 90 days, with no digging and no chemicals.
Danny Miller Plumbing · Pass Christian, Mississippi, USA · 22 October 2026
The challenge
The field was about 50 years old, built from clam and oyster shells that were fouled top to bottom with black organic sludge. Its location and local rules ruled out replacement, and a heavy chemical treatment would have damaged the shell media.
The approach
The septic tank was emptied and two gallons of PRO-PUMP® went straight into the junction box, followed by one gallon a week for the next three weeks. There was no mechanical cleaning and no chemicals.
Results
Within 14 days
First improvement
Within 90 days
Full flow restored
None
Digging or replacement
None
Chemicals
Improvement showed within 14 days, and full flow was back within 90. The shell media returned to its original white colour. The homeowner kept using PRO-PUMP® to prevent a repeat, and the plumber reports recovering normal flow in every problem drain field where he has used it. This is one contractor's report rather than a controlled trial.
Source documentation
Ecological Laboratories case studies (opens in a new tab)