CFS – Pack of 2, Premium Super Activated Cut-to-Fit Carbon Pads for Aquariums – Pond Fresh Water & Saltwater Aquariums, Terrariums & Hydroponics – Charcoal Air Filter Sheet – 18" x 10"

Great product cut to size and place in filter bags. Works great and my tanks look clean.

These are good Carbon Filters.

they work good we will see how long rhey last compared to canister filter carbon. think im going to run carbon reactor next, prob get better water clarity and life out of that. but these would be good for small canister filters with light bio-load

If your looking for thin this is your product. Two days of use almost transparent.

These are the worst carbon pads I’ve ever received. I may has well have ordered the felt kids use for crafts in school because those are better quality than this product. I feel 100% deceived by this sellers add.

Tough to really tell how much filtering its doing on a pond filter. Think of it as faith.Ha

So as the title says it's very thin material. So if you are looking to use it as an air filter it'll work just fine. But if you are looking to use it at an aquarium I would suggest to look elsewhere.

Perhaps I should have read more.. Admittedly I looked at the photo and purchased without reading, but these pads are super thin. Not like what is pictured.

La calidad no es buena, se desgasta rápidamente aún cuando mi acuario es pequeño, no ofrece una buena filtración