This is my 3rd or 4th year of using Dr Pooper products and they have been fantastic! Our septic tank is almost 70 years old and our drain fields are 50! We were looking at having to redo the drain fields and I saw the advertisement online, for Dr Pooper products. I thought, what do we have to lose, if we give this a try, so I placed an order. Following the directions given to open clogged drain fields, like a miracle, my drain fields reopened and the only green grass in my yard was over the drain fields. I have told many people about this product, as it’s been a lifesaver for us! I will continue to make use of the bundle feature, so I have this product available to continue as a monthly maintenance to keep these drain fields working like they should! Safe & Effective!