Septic and cesspool tanks can leak and clog up leading to malfunction. These tanks hold all manner of waste both organic and inorganic. Most causes of problems for these tanks come from introduction of non-biodegradable material which can clog the system and lead to quick fill up. Concrete and plastic tanks can also leak from breakage, while steel tanks are wont to rot away at the bottom. This is why the proper cesspool maintenance is important.