I use the equivalent in my 405's and they work pretty well.
Anyone have any experience with these foam pads in and FX 5 or 6?
or will they plug to easily like the other FX 5 pads..?

http://www.kensfish.com/aquarium-supplies/filter-media/fluval-fx5-fx6-bio-foam-2pack.html
Anyone have any experience with these foam pads in and FX 5 or 6?
or will they plug to easily like the other FX 5 pads..?

http://www.kensfish.com/aquarium-supplies/filter-media/fluval-fx5-fx6-bio-foam-2pack.html