I have a slow draining cesspool. It is a two part (homemade tank I think) tank. The solids and liquid go into the first tank. which has solid walls. there is a window about 3/4 up on the back wall which allows the liquids to flow through. those walls have the cinder blocks turned sideways so the liquids can flow out. I had the system pumped about 2 years ago. Upon which water backed into the first compartment almost imedietely. I left the cover to the cesspool open to monitor it. It hovered below the pipe about 12" for about a week. After that, it stayed just about below the pipeline. I have recently had a backup. I opened the tank and the water was above the pipe (about 1 1/2")coming from the house which goes to the first compartment. I added some "drainz" directly into the tank. After about 1 1/2 days, I could just see the top of the pipe. Will Septic-Scrub help? Can I use with the Drainz product. Thank You, Bob