Roebic Granular Concentrate Root Killer - 2 Lb K-77 Root Killer Destroys The Clogging Tree And Shrub Roots From Pipes Fast. When Roots Invade Sewer Pipes And Clog Septic System Drain Fields, Roebic's Fast-acting Root Killing Formulas Are Needed... $18.99 $17.99 Add to Cart