provided is a parts washer that includes a multi - tiered basin , a cleaning fluid and a biological component , living within the fluid , that breaks down organic waste . the multi - tiered basin includes a sink member with a false bottom , and a support grid and filter are interposed between the false bottom and a bottom panel of the sink member . the false bottom , support grid , and filter are readily removable from tile sink member . the tank is partially filled with the cleaning fluid and a pump and conduit assembly direct a flow of the cleaning fluid to the basin . the cleaning fluid discharged into the basin flows through a drain hole in the false bottom , through the filter and support grid , and then through a drain hole in the bottom panel of the sink member back into the tank for reuse . the cleaning fluid includes , at least , a surfactant that functions to remove organic waste from the parts being washed . the biological component within the cleaning fluid includes nonpathogenic microorganisms that break down the organic waste . the cleaning fluid is not toxic to the microorganisms . the pump and conduit assembly , in addition to aiding in the removal of organic waste , functions to aerate the cleaning fluid to maintain a proper environment for the microorganisms . a heater , thermostat , and level control assembly function to maintain the cleaning fluid within a certain temperature range so as to aid in the removal of organic waste and maintain a proper environment for the microorganisms .