Seachem The Bag – 180-Micron Reusable Filter Media Bag
Seachem The Bag is a durable, reusable aquarium filter media bag designed to securely contain loose chemical, resin, mechanical, and biological filtration media. Its superfine 180-micron polyethylene mesh helps prevent even small resin beads from escaping while allowing aquarium water to flow through the media.
Unlike conventional media bags with stitched seams, The Bag is manufactured with a strong welded, non-stitched seam. This construction resists deterioration from bleach, acids, caustics, and other chemicals commonly encountered when regenerating specialty aquarium media.
The Bag measures approximately 5 × 9.5 inches and can securely hold about 500 mL of filtration media. Its compact size makes it suitable for canister filters, hang-on-back filters, sumps, internal filter chambers, box filters, and other filtration systems with adequate media space.
Key Features
- Superfine 180-Micron Mesh: Helps contain fine resin media and small filtration particles
- Welded Non-Stitched Seams: Resists the degradation that can affect traditional stitched media bags
- Reusable Locking Closure: Includes a resealable plastic locking tie for secure installation and convenient reopening
- Chemical-Resistant Construction: Resistant to bleach, acids, and caustic regeneration solutions
- Broad Media Compatibility: Compatible with Seachem’s complete filtration-media line
- Approximately 500 mL Capacity: Holds a useful amount of chemical, resin, or biological media
- Freshwater & Marine Use: Suitable for freshwater, planted, saltwater, and reef aquariums
- Long-Lasting Polyethylene Material: Designed for repeated filtration and regeneration cycles
Product Information
- Brand: Seachem
- Product: The Bag
- Product Type: Reusable aquarium filter media bag
- Dimensions: Approximately 5 × 9.5 inches
- Metric Dimensions: Approximately 13 × 25.5 cm
- Mesh Size: 180 microns
- Mesh Classification: Superfine
- Material: Polyethylene
- Seam Type: Welded
- Closure: Resealable plastic locking tie
- Media Capacity: Approximately 500 mL
- Aquarium Type: Freshwater and saltwater aquariums
Best Used For
- Seachem Purigen
- Seachem CupriSorb
- Seachem PhosGuard
- Seachem PhosBond
- Seachem MatrixCarbon
- Seachem SeaGel
- Seachem Renew
- Seachem Zeolite
- Activated carbon
- Phosphate-removing media
- Fine resin filtration media
- Compatible biological filter media
- Custom aquarium media combinations
Compatible Filter Types
- External canister filters
- Hang-on-back filters with suitable media chambers
- Saltwater sumps
- Internal aquarium filters
- Box filters
- Trickle filters
- Custom filtration chambers
- High-flow media compartments
Directions for Use
- Open the resealable locking closure.
- Place the desired aquarium filtration media inside the bag.
- Do not pack the media tightly or fill the bag completely.
- Leave enough room for the media to sit loosely and for water to circulate around it.
- Secure the bag using the supplied locking closure.
- Rinse the filled bag according to the directions for the selected filtration media.
- Place the bag inside the filter where water will flow directly through it.
- Inspect the bag and media during routine filter maintenance.
Do Not Overfill
Seachem The Bag securely holds approximately 500 mL of filtration media, but it should not be stretched, overpacked, or filled until the material presses tightly against the welded seams.
Filter media should remain somewhat loose inside the bag. This provides room for water to circulate around the media and reduces unnecessary pressure on the seam.
Overfilling, pulling forcefully on the bag, or handling a tightly packed bag roughly may cause the welded seam to separate.
Proper Filter Placement
Place The Bag where aquarium water is forced directly through the media rather than flowing around it. Good contact between the aquarium water and the filtration media improves filtration efficiency.
Suitable placement may include:
- Between filter sponges in a canister basket
- Inside a hang-on-back media chamber
- Between sump baffles
- After mechanical filtration
- Inside a high-flow internal filter chamber
Mechanical filtration should generally be positioned before fine chemical or resin media whenever possible. Foam, filter floss, or another mechanical stage can capture larger debris before it reaches The Bag and help extend the useful life of the enclosed media.
Using The Bag with Purigen
The Bag’s superfine 180-micron mesh makes it suitable for loose Seachem Purigen resin. Its welded polyethylene construction is also resistant to the bleach and dechlorination solutions used during Purigen regeneration.
Follow Seachem’s complete Purigen regeneration directions carefully. The Bag’s chemical resistance does not eliminate the need for proper rinsing, dechlorination, protective equipment, or chlorine testing before the regenerated media is returned to the aquarium.
Using The Bag with CupriSorb
Seachem CupriSorb may be placed inside The Bag for copper and heavy-metal removal. The fine mesh helps contain the media while allowing aquarium water to pass through it.
The Bag’s resistance to acids makes it suitable for CupriSorb’s manufacturer-approved regeneration process. Follow the current CupriSorb directions exactly and rinse the bag and media thoroughly before reuse.
Using The Bag with Activated Carbon
Activated carbon and MatrixCarbon may be placed inside The Bag for chemical filtration. Rinse carbon thoroughly before installation to remove loose carbon dust.
Do not grind, crush, or tightly compress carbon inside the bag. Leave enough room for water to circulate through the granules.
Using The Bag with Phosphate Media
The Bag may be used with compatible phosphate- and silicate-removing media such as PhosGuard or PhosBond.
Rinse the selected media according to its label directions before use. Place the filled bag in a strong-flow area, but avoid arrangements that cause the media to tumble or grind excessively.
Using The Bag for Biological Media
The Bag is compatible with Seachem’s complete filtration-media line and may hold appropriately sized biological media when useful for the filter design.
Biological media generally benefits from unrestricted water flow and may not require such a fine mesh. For larger media such as Matrix, a coarser Zip Bag may provide greater water movement and more capacity in some filters.
Choose the bag according to the size of the media, the available filter space, and the desired water flow.
The Bag vs. Seachem Zip Bag
- The Bag: Superfine 180-micron polyethylene mesh, welded seams, and a plastic locking closure
- Zip Bag: Coarser PVC mesh, stitched seams, and a corrosion-resistant zipper
The Bag is the better choice for very fine resins such as loose Purigen and for media that may be regenerated using bleach, acid, or caustic solutions.
Seachem Zip Bags are available in different mesh sizes and may be better suited to larger granular or biological media where maximum water flow is preferred.
Cleaning and Reusing The Bag
The Bag may be rinsed and reused when changing or cleaning filter media.
- Turn off and unplug the aquarium filter.
- Remove the bag carefully to avoid spilling media.
- Open the resealable locking closure.
- Remove or regenerate the media according to its product directions.
- Rinse the empty bag thoroughly.
- Inspect the mesh, closure, and welded seams.
- Refill only if the bag remains undamaged.
Do not use soap, detergent, scented cleaners, or household chemicals unless they are specifically part of the approved regeneration procedure for the enclosed media.
Chemical Resistance
The Bag is resistant to bleach, acids, and caustics. This is particularly useful for regenerable filtration products that require exposure to stronger chemical solutions.
Chemical resistance does not make the bag indestructible. Inspect it after every regeneration cycle and discontinue use if the mesh, locking closure, or welded seams show signs of damage.
Water-Flow Tips
- Do not overfill or tightly pack the media
- Leave space for the contents to move slightly
- Place the bag where water must pass through it
- Avoid blocking filter intakes or impellers
- Clean mechanical filtration before it becomes clogged
- Inspect the bag if filter flow begins to decline
- Use multiple loosely filled bags instead of one overpacked bag when necessary
Important Aquarium Care Note
Seachem The Bag is a media holder and does not filter aquarium water by itself. Its performance depends on the filtration media placed inside it and the amount of water flowing through the bag.
Choose filtration media according to the aquarium’s actual needs. Chemical media does not replace biological filtration, mechanical cleaning, water changes, water testing, or proper aquarium maintenance.
Inspect The Bag regularly. Do not continue using it if the mesh, welded seams, or locking closure become damaged.
Frequently Asked Questions
What is Seachem The Bag used for?
The Bag holds loose aquarium filtration media while allowing water to flow through the media inside a filter.
What size is The Bag?
It measures approximately 5 × 9.5 inches, or 13 × 25.5 cm.
What is the mesh size?
The Bag uses a superfine 180-micron mesh.
What material is it made from?
It is made from polyethylene.
Does it have stitched seams?
No. The Bag uses welded, non-stitched seams.
Does The Bag use a drawstring?
No. It uses a resealable plastic locking closure similar to a reusable locking tie.
How much media does The Bag hold?
It securely holds approximately 500 mL of filtration media.
Can The Bag hold loose Purigen?
Yes. Its 180-micron mesh is fine enough for Purigen and other small resin media.
Is The Bag reusable?
Yes. It may be cleaned and reused as long as the mesh, closure, and welded seams remain undamaged.
Is it resistant to bleach?
Yes. It is resistant to bleach, acids, and caustic solutions commonly used during approved media-regeneration procedures.
Can it be used in saltwater and reef aquariums?
Yes. The polyethylene bag and plastic closure are suitable for freshwater and marine filtration systems.
Can it hold activated carbon?
Yes. It may be used with activated carbon, MatrixCarbon, and other compatible chemical media.
Can it hold phosphate-removing media?
Yes. It is suitable for compatible products such as PhosGuard and PhosBond.
Can it hold biological media?
Yes, although a coarser bag may provide better flow for larger biological media such as Matrix.
Why should The Bag not be overfilled?
Overfilling restricts water flow and places excessive pressure on the welded seams, which may cause them to separate.
Where should The Bag be placed?
Place it inside the filter where water is forced directly through the bag and enclosed media.
What is the difference between The Bag and a Seachem Zip Bag?
The Bag has finer 180-micron polyethylene mesh and welded seams. Zip Bags have coarser PVC mesh, stitched seams, and zipper closures.
Does The Bag include filtration media?
No. Filtration media is normally selected and purchased separately unless the retailer’s package specifically states otherwise.
Available at Tropical Treasures Wyo
Seachem The Bag provides superfine 180-micron mesh, welded seams, and a reusable locking closure for securely holding Purigen, CupriSorb, activated carbon, phosphate removers, resins, and other aquarium filter media.
Visit Tropical Treasures Wyo in Cheyenne, Wyoming, to shop Seachem filter media, Purigen, MatrixCarbon, PhosGuard, PhosBond, CupriSorb, canister filters, hang-on-back filters, and aquarium filtration accessories.
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