Review on Zep ZSTP6-6-pack Septic Treatment Concentrate (Case of 6) - Safe for All Septic Systems by Shelly Cook

This is one of those products that is difficult to review. You don't see it, so you don't know. I have been using this product once a month for about 3 years. I haven't had any issues with my septic system so I think it's doing the job it's supposed to do. I was introduced to ZEP products when my son worked for the company and brought home the products to sell. I can honestly say that I have never tried their product that I didn't like and didn't work well. If I have the opportunity to buy a product and there are different brands, I always choose the ZEP brand whenever possible.