4 Inch Ring by 15 Inch Long Filter Socks 5 Micron - Aquarium Sump Pond Felt Fabric Filter Bag - 3 Pack (5 Micron)

We used these filters to modify our pool vac and it captured the fine silt that wasn't filtered by the regular pool filtration system. Cleaned up well after 1st use.

I use these filters on the water inlet in my pool. They filter out all of the algae and small particles in the water that my catridge filter misses. I throw them in the washer when they turn brown from the algae and they come out clean and ready to use again. Usually I change the filter every couple of weeks depending on how much we use the pool. Keeps my pool sparkling clean!

Suitable to use but expensive.

Is exactly as described. Will make your skimmer go nuts for a bit even if you rinse it well before use.

I personally cut them up to install in my canister filtration unit. At 10 microns it takes out all visible stuff.