1mm Mesh Holes Aquarium Filter Bags, Fish Tank Media Mesh Bags with Plastic Zipper for Charcoal Media, Bio Balls, Ceramic Rings, Ammonia Remover (10 Pack, Large, Black)

One of the zippers failed … otherwise goodUsing as a small outdoor fountain pump pre-filter

I used these to pack with soil for my planted aquarium. You will still get the fine dust coming through, but it keeps the dirt inside the bag. I placed them on the bottom of my tank and then covered with sand. When I pull up plants I don’t get a nasty cloud or any dirt coming up as a result.

I am a new fish mom and I saw that the filter I bought had caught betta fins and killed their fish. So I bought these on a whim thinking I could use these to cover my filter. This bag fits over my filter perfectly to keep my fish safe from the fans. I am so so happy with my purchase. If anyone has the "Tetra Whisper Internal Filter for 3 to 10 Gallons" BUY THIS TO SAVE YOUR FISH!!

I have been buying the filter products for my canister filter for years, after finding these I have saved quite a bit of money due to I can just buy the media and fill the bags myself and reuse the bags, I love that the zippers are made out of plastic, so nothing rusts and can hurt my fish.

No issues with these so far. Bought to use to hold charcoal and ceramic media for my 16g bio cube. Zippers work well and a great value for the money. The bags were a bit bigger than I expected but that was my fault for not paying attention to the description details. All in all, cheap enough to throw away and repurchase when needed, but durable enough that you don’t have to :) great buy!

Sturdy but finely meshed material. Good zipper, great for small filter media

I have been using these bags with bio rings in them in all my tanks for the last two years. They are great!!!

Excellent bag for filter media. Good size.