- Sku: 1522
- Vendor: Seachem
Seachem Zip Bag
Seachem Zip Bag is a reusable mesh filter media bag with a corrosion-proof plastic zipper, made to hold loose filtration media securely in any freshwater or saltwater filter. There are no strings or ties to fuss with: just unzip, fill, and zip it shut. Choose the mesh and size that match your media, from a fine mesh for small granular media up to a large coarse-mesh bag for big canisters and sumps. For the finest resins, reach for the tighter-weave Seachem The Bag, and browse more filter media at Squeaky's.
Features
- Durable mesh bag with reinforced seams
- Corrosion-proof plastic zipper, no strings or ties
- Reusable, just rinse and refill
- Three mesh options so you can match the bag to your media
- Works in both freshwater and saltwater filters
Choose Your Size
| Size | Mesh | Dimensions | Capacity | Best for |
|---|---|---|---|---|
| Small | Fine | 12.5 x 5.5 in | About 1 L | Small granular media like PhosGuard, MatrixCarbon, and SeaGel |
| Medium | Medium | 12.5 x 5.5 in | About 1 L | Intermediate media larger than resins and sands |
| Large | Coarse | 19 x 17 in | Up to 18 L | Large media and big canister filters or sumps |
Which Size Is Right for You?
Match the mesh to your media so it stays contained while water still flows freely. Fine, granular media such as PhosGuard or MatrixCarbon belong in the Small fine-mesh bag. Chunkier media that is larger than resins and sands fits the Medium mesh. For big volumes of large media, like bio-media in a large canister or sump, the Large coarse-mesh bag holds up to 18 liters.
Specifications
| Brand | Seachem |
| Product | Zip Bag, reusable mesh filter bag |
| Sizes | Small (fine), Medium, Large (coarse) |
| Closure | Corrosion-proof plastic zipper, no strings or ties |
| Small and Medium | 12.5 x 5.5 in (32 x 14 cm), about 1 L |
| Large | 19 x 17 in (48 x 43 cm), up to 18 L |
| Water type | Freshwater and saltwater |
| Country of origin | United States |
Recommended Pairings
- Seachem The Bag is a finer 180 micron bag for the smallest resins like Purigen.
- Seachem Matrix is high-capacity bio-media to fill the coarse-mesh Large.
- Seachem Purigen is a premium resin for a fine mesh bag.
- Filter media and cartridges for more media to fill your bag.
FAQ
What is the difference between Small and Medium? They share the same 12.5 x 5.5 in size, but the Small has a finer mesh for small granular media, while the Medium has a slightly more open mesh for intermediate media. Pick the mesh based on how fine your media is.
Is the Zip Bag reusable? Yes. The seams are reinforced and the zipper is corrosion-proof, so you can rinse it out and refill it many times.
Can I use it in freshwater and saltwater? Yes. The Zip Bag works in any freshwater or saltwater filter.
How much does the Large hold? The Large coarse-mesh bag holds up to 18 liters of media, making it a good fit for large canister filters and sumps.
Have a question?

Seachem Zip Bag


