Hi-Yield - Root Killer - w/ Copper Sulfate - 1 1/2 lb.

Use to clear out sewer lines, septic tanks and drain fields. Will not harm trees, shrubs, sewer or drain pipes.  Formulated to quickly and economically kill and dissolve fungus and roots from trees and shrubs. Active Ingredient Copper sulfate pentahydrate 99% Use in Sewer Pipes and Septic Tank Drain Fields Application Apply 1/3 of container crystals into a toilet bowl; Immediately flush toilet repeatedly until all crystals have been flushed down; Repeat application every 3-4 months