Find the spot where the pipe from house connects to septic tank. Dig a hole
above that spot and fill with rock salt 4-10 lbs. The point where the PVC
pipe connects to tank is where mini roots can enter and clog the pipe. Any
non-toilet paper such as paper towel will catch on roots and clog the pipe.

--
for full context, visit https://www.homeownershub.com/mainte...n-1159175-.htm