Review on 🐠 Geiserailie 15 Pieces Aquarium Filter Bags: Fine Mesh Nylon Bags for Resins & Activated Carbon in Fresh or Saltwater Tanks by Dawn Bunger

That's great! I took some photos. They are large enough that only one is needed per canister in a canister filter. For reference, I placed an empty bag on top of one of the Marineland 220 containers. The zippers are not metal and seem to survive in the filter. At first glance, the bag looks double-stitched. To be honest, I have more faith in them than in pure bags. I just broke two this morning trying to put them back on. Haven't actually tried them yet, but I'm very confident in their construction. And as another reviewer said, the mesh is good enough for purigen or other small environments. I've been looking for a bag of this caliber for years. I am completely satisfied with this purchase and I highly recommend it for aquariums!