Which statement about the use of septic-tank cleaners is true?

The statement that the use of septic-tank cleaners is not advised is true because many experts recommend against their use due to potential environmental impacts and the possibility of harming the natural bacteria needed for effective septic tank operation. Septic systems rely on a balance of microorganisms to break down organic waste, and introducing chemical cleaners can disrupt this balance, leading to system failure, backups, or even groundwater contamination.

While some additives claim to enhance septic system performance, the long-term consequences of their use, such as potential harm to bacterial processes and leaching of harmful substances into the environment, are significant concerns. Therefore, the guidance usually emphasizes regular maintenance, such as pumping, over the use of chemical cleaners.