I do not think this is intended to have a sump its only 3g, I think its just a simple overflow/return chamber to pull the surface skim off, I will make a crude 3d media basket to go in mine. The AIO have more chambers, filter sock etc...at least that is my understanding.
Ok hopefully they clarify. I was just wondering because I thought AIO then someone said they just needed a sump so at this point I realize... I don't know which it is lol
It does not matter either way to me but just want to know what to plan for.