Three months ago I had to dig up my septic tank. After getting the drain field sucked out the tanker owner said "if this doesn't work you will have to put in a new drain field" I studied your product claims after the drain field backed up again. Almost to the day one month later the pumper was back he shook his head and said"I have never heard of any chemical that can do what Septic Scrub say's it will do, but let me know if it works I could make a lot of customers happy". Be prepared to talk to Carter at A-1 Environmental. Today 3-2-00 I buried the tank. Please let me know how to maintain my drain field. Thank you Arcan