how to increase bacteria in septic tank naturally ?
Question
how to increase bacteria in septic tank naturally
Jeffrey M. Evans
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how to increase bacteria in septic tank naturally
Answer ( 1 )
Key idea
A healthy septic tank already contains plenty of bacteria, you just need to keep the conditions right for them to grow.
Do not add harsh chemicals
Bleach, drain cleaners, antibacterial soap and to much chlorine kill the existing microbes. Use mild detergents and spread out laundry loads so the tank is not shocked.
Feed the microbes
Normal household wastewater gives them carbon and nitrogen. If the house is empty for weeks pour a bucket of plain yoghurt or buttermilk down the toilet, it supplies live lactic acid bacteria that jump‑start the community.
Maintain temperature and oxygen
Insulate the tank lid in cold climates to keep it above 10 °C. Make sure the vent stack is open so a little air diffuses in; strict anaerobes dominate but small oxygen leaks help facultative bacteria start the digestion chain.
Pumping schedule
Pump every 3–5 years. Removing all sludge too often strips the slow growing methanogens and you have to wait months for them to repopulate.
Bottom line, you usually do not need commercial “septic starters”. Simple good habits keep the natural bacterial population thriving.