WORLD'S BEST FILTER FLOSS: An inTank secret, super high quality double-bonded poly pad unlike any other on the market. This Filter Floss catches detritus yet allows for the maximum amount of flow. Thicker than other similar poly filters available so you use less. No more doubling or tripling up, use one cut square on top of your inTank Media Basket, or inside your sump, hang on back filter, canister filter, pond, terrarium or other filter. The Value Pack includes a very generous amount that will last a long time with normal use. Easily cut to fit with a household scissors.