CORISRX 3IN1 Aquarium Filter Sponge Foam Pads - Filter Media for 20 Gallon Betta Fish Tank Supplies, Brine Shrimp Coarse Sponge Bio Filter Sheet - Filter Sponge Accessories (3IN1 Filter Sponge)

Nice Filter Media3 different coarseness - I think it's like Medium to Fine to More Fine. I don't think it's Coarse or Super Fine. It's great for upgrading filter boxes. Easy to cut into size you need. I use scissors and box knife to cut into size. I like that the 3 different coarseness are all included into one instead of having to buy and deal with separate ones.It's a stiff pad, so best for applications where you just slide it in. It won't scrunch up well.Very happy with this media.

I like this filter because it has all the layers you need and can be cut to size. Perfect fit! So far seems to be doing it’s job!

I cut this down to size to fit my mini filter and seems to work well. You can definitely see the size difference in each layer.