Only Lovuu 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)

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!

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 used these to hold fine gravel and sand in my pond filter. They work great and very economical. Small size makes them easy to form round curves and obstacles. Zippers are a little flimsy but overall it's a great value for the money.

Nice product so far, but it was too big for my 10 GAL small power filter.

i use them on 4 of my tanks, never had an issue

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.

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

Great product fair$