A normally operating household septic system does not need a bacterial starter after pumping. Pumping removes accumulated waste; it does not sterilise the system. Normal toilet and household wastewater use introduces microorganisms again. Adding a packet of bacteria, enzymes or yeast is not a necessary step in restarting ordinary use, and it does not replace the system’s required inspections or future pumping.
Keep the pumping report and follow any instructions the technician gives for your particular equipment. If drains remain slow or an alarm appears after the visit, report the symptoms and service date instead of trying to correct the problem with an additive. Ask what was checked and whether further assessment is needed. Our guide to septic pumping and cleaning explains why removing tank contents does not establish that every component is working properly.