Several things can ruin a septic tank over time, including dumping harsh chemicals (like bleach and ammonia), pesticides, and paint thinners down your drain because they can kill the bacteria in your septic tank. You should also make sure to only flush waste and toilet paper in your toilet—otherwise, you could clog your system.

Baking soda can help neutralize septic tank odors. If the pH balance in your tank is off, it may emit a sulfurous, rotten-egg-like smell. Flushing about one cup of baking soda down the toilet once a week can help neutralize the odor. To increase the beneficial bacteria in your tank, you can add three rotten tomatoes through your garbage disposal every three months.

To prevent odors in the first place, only flush human waste and toilet paper. Avoid pouring coffee grounds, fats, oils, or grease down your drains, as this can lead to clogs. While these methods can help, the most effective long-term solution is to have your septic tank pumped regularly, typically every three to five years. Because sewage gas can be toxic, it is recommended to hire a professional to identify the source of the smell rather than only trying to neutralize it.

You should never pour antifreeze down the drain or outside on the ground. Because it's highly toxic, antifreeze can still impact people and animals long after it drains. Antifreeze can contaminate water and sewage systems, and any that gets into storm drains and water supplies can attract animals and harm those that ingest it.

Slow drains, gurgling sounds, or foul odors can indicate septic issues. Regular inspections help identify when pumping is necessary to avoid overflow.