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If you add more bacteria without more waste, the bacteria will only eat each other. You don’t need to add more, feed them or support them at all.

The natural bacteria in the tank get all the nutrients they need from the waste that’s already there with them. In most systems, the effluent flows through devices that further purify it and gradually release it into the soil. In the middle is a layer of clear wastewater called effluent. Solids fall to the bottom creating a layer known as sludge, while fats rise to the top to create a scum layer. This waste contains bacteria that, once in the septic tank, separate the waste into layers. Your septic tank receives all the wastewater and waste solids from your home’s plumbing system. They’re designed to work without additives. Septic systems work by taking advantage of a completely natural biological process that doesn’t need any human intervention. The biggest reason so many people use unnecessary or harmful septic tank additives is that they don’t really understand how a septic system does its job. How Septic Systems Work Without Additives Before you decide to add anything to your septic tank, get to know how these systems and the most common additives work.

In reality, though, these additives aren’t necessary and often do more harm than good. Manufacturers of septic tank additives know this and offer products that promise to reduce the need for pumping, dissolve clogs or otherwise improve your septic system.