Call your pumper regularly to clean out your tank. The frequency of pumping will depend on the size of your system, the number of people in the household, the previous care the system has received, etc. Rely on your pumper’s knowledge and experience to set up a pumping schedule. Once your tank has been pumped, monthly applications of bioFORCE Septic Tank Additive will maintain the bacterial level in your tank and leach field. This is needed for optimal system performance.