These organisms digest the waste that is pumped into the top of the tank and create humus, a living, self-regenerating matrix that looks like soil but is 90% water and serves as a filter.

• 这些生物会分解被抽吸入水槽顶层的废弃物并形成腐殖质，后者是一种可以自我再生的活性基质，看上去像土壤，但其90%25是水分，并充当了过滤器。