As some of you know my recent Ebay Fluval 404 buy although in excellent condition for $35 came without the 4 mechanical filtering sponges. As I was about to spend $13 for 4 new sponges at LFS it suddenly occurred to me that I had an extra new AquaClear 110 sponge that was about the same size that's cost me new only $5. Measuring the sponge it was evident it was the same high but 4X the width and only required to be cut into 4 even sections. Having upholstered my own motorcycle seats I realized this could be done worth a simple bread knife if cut evenly in half, then cut in half again. The results were better then expected and fit better and more snugly then regular sponges. Below are the photo steps.
I will try it. and yes with all these tanks thinking about moving into a warehouse so I will have more room LOL