Does grease decompose in a septic tank?

Yes, grease can decompose in a septic tank, but it does so much more slowly than other organic materials. While bacteria in the septic tank can break down some grease, excessive amounts can lead to clogs and interfere with the tank's overall function. It's best to minimize the introduction of grease and fats into the septic system to maintain its efficiency and longevity. Regular maintenance and pumping of the tank can help manage any buildup.