I've never seen or heard of a springtail more than a couple millimeters long. What kind of Oscars are you keeping that will eat them at all, much less be "satisfied" with them?
Welp, I now have the ultimate proof Brick is back to eating pellets...for months I was spared excess cleanup as his poop would break up and dissolve in the filters.
Fast forward to this morning. After sleeping on his side and having a leisurely breakfast, Brick left log tokens all over the tank...trust me I DIDN'T miss this part!