Which substance should never be added to septic tanks?

Septic tanks rely on a balance of microorganisms to break down organic matter. The addition of substances that disrupt this balance is harmful to the functioning of the system.

Salt or brine can cause a disruption in the microbial activity essential for the decomposition process. High salinity can negatively impact the bacteria that digest waste, potentially leading to system failure.

Sulphuric acid is a highly corrosive substance that can damage the tank and the associated plumbing. Moreover, it can severely disrupt the pH balance of the septic system, which is critical for the wellbeing of the bacteria responsible for waste breakdown.

Chlorine bleach and ammonia are strong disinfectants that can kill the beneficial bacteria in the septic tank. Without these microorganisms, the system cannot effectively treat wastewater, leading to backups and other serious issues.

Therefore, it is essential to avoid adding any of these substances to a septic system, as they all have detrimental effects on its performance and longevity.