Geiserailie 15 Pieces Aquarium Filter Media Bags 150 Micrometer Fine Filter Bags Mesh Reusable with Zipper for Activated Carbon Resins(5.5 x 7.9 Inch,Nylon)

Why did you pick this product vs others?:Great bags for filter additive like purigen. Keeps everything in and zippers close tightly.

These bags breathe well, can hold a decent amount, are made of nylon and don’t obscure the contents. This makes the cycle of drying out whatever you need to dry (3D printing filament, in my case), to seeing the dessicant change color if you’re using color indicating dessixant, to throwing the bag in the oven to dry out again easy. I haven’t discovered the temperature these bags stop being able to tolerate the heat, but most nylons can handle the 250°F / 125°C for a quick dry, and definitely the 190°F my dehydrator maxes out at, so I’m not too worried they won’t handle it. My main concern was that the mesh is a good size to not let the smallest silica beads fall out, while not being so fine that there is not enough free air flow to be effective.Not quite the use they were intended (100% wet water vs <15% wet air!) but for those looking for good nylon mesh bags for drying out their 3D printing filament or gun safe or whatever it is, the larger size here will easily hold a pound of silica.

Works well for fine activated carbon and medias like seachem Purigen

-Good size for my aquaclear 30gal HOB filter. Works great with carbon and similarly sized or smaller media. Would work fine with large media but a larger hole mess would be better for flow. Also a great value.-Biggest pro is they even work great with my purigen resin media without leaking the media out. Also survived the bleach/regen process.-Only complaint is the zipper doesn't open very wide so filling can be quite messy without a funnel. But otherwise works perfectly. And they could be about an inch longer to maximize filtration for my size filter but I imagine it's this size to fit a wider range of filter brands. So not that big of a deal. So far they're the best I've found for my application.

I got these bags to hold Purigen in my 10 gallon Aqueon filter.It fits nicely behind the charcoal filter. I put biomedia stones in a second bag and it fits nicely next to the Purigen bag. The two bags, side by side, fit easily and perfectly behind the Aqueon charcoal filter.Great bags that do the job well.Recommend!

Definitely value for money. It's a little bigger than I needed but performs as I expected. It's durable and can be used for extended period of time without damage or loss in performance.

Purigen is the best chemical filtration media out there. Problem is it's super fine granule size is too small for normal media bags. Your can buy the 100ml size in this own bag but this is too much for smaller aquarium and I've found these bags often split at the seams. These bags allow you to but Purigen in bulk and place just the right amount into each bag. This saves your money and allows for a wider range of uses. The seams on these are stitched instead of just heat sealed, so are less likely to fall apart.

I ordered the small size and they are SMALL! To the point of almost being unusable. It's almost impossible to get media into them. So I ordered party sashe bags, much less expensive and easier to use. Plus they are so inexpensive I just throw the exhausted media out still in the bag