Between my 3 tanks I have 3 Emperor400s & 2 Emperor 280s. I occasionally use the Marineland cartridges, but often cut out filter pad and put it in. If I dont have anything in the area for the media cartridges can I just unceremoniously cram the area full of filterfloss, bioballs, ceramictubes/biomedia? Other than the fact that this would complicate filter maintenance, is it OK to do? I am thinking mostly of the filter floss or a cut-your-own-filter-pad material that would be cheap and easier to remove. Anyone done this? I can't think of a reason it wouldn't work.