Firecracker

OK, so I've read the suggestions to use cut-to-fit pieces from a large piece of filter material. But what do you support it with when you put it into the slot for the filter in front of the biowheel? Without the plastic thingy that the OE replacement filters have, won't it get sucked out of the slot?

COBettaCouple

On some filters we still have the plastic frame and use the clip to clip the filter floss onto it, but even in the tanks that we don't have a frame, the filter floss does fine.