4 Pack Aquarium Filter Media Bio Sponge Pad 16 x 12 x 1 inch, Fish Pond Foam Filter 20/30/40 PPI (Green 40ppi 4pack)

This foam is easily cut to size for whatever function you plan. I use it in my FX4 aquarium filters and it's the best!

I use this around a pump in my pond (300gal) to filter out the gunk. Works well. Every so often I power wash it to clean out the build up and put it back. Makes the water turn from murky to clear.

Love it It keeps my pond clean

I cut and put this in as a pre filter in my power filter to get some of the bigger debris out prior to the hard plastic carbon filter. I now no longer have to run the expensive pre-made filter cartridges

Good deal

Best to wet and let air dry for the foam to rebound from being vaccumme packed.

I used this together with an aquarium divider for my 20 & 29 gallon aquarium that I use for breeding. It prevents the tiny fries from escaping.

This sponge is perfect for a first-layer of a canister, or even in my HoB filters! I haven’t found anywhere near this price from any other seller. I personally prefer 30ppi sponge, but this size is what I use for the bottom layer of my canister.