AQUANEAT 2 Pack Aquarium Bio Sponge Filter Media Pad Cut-to-Size Open Cell Foam Sheet for Fish Tank Sump (9" x 9" x 0.5") Black

Will work as a pre-filter, but is very, very fine, and clogs quickly. I wish there was something in between this and the very coarse sponge that seems to be the next step. I knew it was fine, but figured I'd give it a shot, so while it's not what I needed, it's good stuff.

Just what I needed and easy to cut to size

It's the expected quality for fish tank foam

The product works exactly as advertised and was delivered promptly

This was a great price and a quality product. It’s exactly what I need for my small freshwater tank. I can cut the filters to the exact size that I need. And I have plenty of material for many many more filters to go.

This product works well still but it was a bit misleading it looks and seems like it’s more coarse than it really is. It is a pretty fine material for sponge so it will clog up easier in the filter. It still works fine and you get a lot for the price but it’s just a little to compact for the intended use.

Ordered these as a dust filter for my Mac Studio computer, after purchasing it. The Mac Studio's air intake is, unfortunately, on the underside of the computer, so it vacuums up any dust in the area. The biggest problem is, the new Macs aren't designed to be opened without voiding the warranty, so I needed a solution to filter dust out before it got sucked in and trapped inside the machine, causing potential problems.After looking online for a solution, I saw that the easiest and cheapest method was to sit the Mac Studio on top of a piece of open cell foam, so that air could still circulate through the foam into the computer's air intake, while filtering out most of the dust that would otherwise come into the computer, as well.And, two weeks in, it seems to be working fine! All I did was trim one of the sponge filters down to a size to cover the computer's intake vents and sat the computer on top of it, so its air intake sank down into the foam! Even though I have my Mac Studio sitting on top of a separate hub, I just sandwiched the sponge filter between the two devices and it works like a charm!A great, quick and easy solution for a potentially-troublesome problem! 😊

We rebuild our fish tank filters to save money. These sheets are indispensable for that purpose. They can also be cleaned a few times before they lose their filtration capabilities.