The Septic Helper 2000 is the best product on the market! But their sales team is horrible! Been using it for over 20 years and haven’t had problems since I started but just like others the sales calls prevented me from ordering again...I bought a 25 year supply the first time...Same as others the salesman now say the product is old and I need to rebuy...luckily I changed phone numbers and they stopped calling...don’t know what I’ll do when I run out of product