Roebic Septic Tank Treatment and Cesspool Cleaner is specially formulated to clean sluggish septic tanks, cesspools, drywells, and drain fields efficiently. This powerful treatment contains fast-acting bacteria cultures that quickly restore your system's operating efficiency. It is to apply this cleaner as soon as any sluggishness is noticed in your septic tank or cesspool. Within one week, your system should return to normal operation. For ongoing maintenance and to prevent future clogging, follow up with Roebic K37 or K47 treatments. Use one quart of this product for every 500 gallons of septic capacity. Each bottle contains 32 ounces of solution, making it easy to measure and apply. Model Number: K57-Q-12