markandhisfish
comfortably numb
i wouldnt say it was overkill . it doesnt really matter how you arrange the media imo. 1 of my 2217s is exactly as it comes out of the box with the sponges and floss . the other 1 has a sponge in the bottom then bioballs then a sponge and floss on the top . the only reason i used bioballs in the 2nd filter is that it was a replacement for my old 2028 and i wanted to "instantly cycle" it rather than seed it etc so i just filled it with all the mature media from the 2028 , which just happened to be bioballs but thats the beauty of the single chamber design of the classic range , you can use pretty much any media you want in any arrangement .