Large Sump. What to put in it?

[spedly]

Unless you need it for a specific reason just use it collect detritus and vacuum out as necessary. Doesn't get any more low maintenance than that and won't turn into a phosphate factory.

[ponokareefer]

If I pick up some pods from a pet store and throw them in this section, would I need to get them some kind of food to survive or just eat the small particles that find their way in?