Hi-Yield Root Killer quickly and economically kills and dissolves tree and shrub roots that invade sewer lines, septic tanks, and drain fields. The copper sulfate crystal formula is applied through a toilet or drain and works to clear blockages without harming the trees and shrubs above ground.

• Clears roots from sewer lines, septic tanks, and drain fields
• Will not harm trees, shrubs, or drain pipes when used as directed
• Active ingredient: Copper sulfate pentahydrate crystals
• Easy application - pour into toilet bowl and flush
• Use 1/3 of container per application
• Repeat every 3-4 months for ongoing maintenance
• 1-1/2 lb container