IceCap Zip Net Media Bag, 4inx12in
SKU: IC-ZNB4
- 150-Micron Fine Mesh Grid: Optimally woven diameter safeguards intermediate to small chemical media granules from leaking into pump impellers.
- Corrosion-Resistant Plastic Zipper: Outfitted with a high-quality polymer zipper mechanism that is completely impervious to rust, binding, or saltwater degradation.
- 100% Metal-Free Material Matrix: Constructed entirely from high-grade, chemically inert nylon and plastic that will not leach pollutants into reef tanks.
- Versatile 4in x 12in Profile: High-capacity, slender footprint slips easily into deep sump baffles, overflow chambers, or high-volume canister media baskets.
- Rinse and Reuse Durability: Tough nylon fabric walls rinse out quickly under fresh water, allowing you to reload fresh bulk media over and over again.
- Versatile Media Compatibility: Safely encloses coarse or pelletized activated carbons, granular ferric oxide (GFO), zeolite, and biological ceramic rings.
IceCap
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IceCap Zip Net Filter Media Bag — 4" x 12" (SKU: IC-ZNB4)
The IceCap Zip Net Filter Media Bag (SKU: IC-ZNB4) is an authentic, heavy-duty chemical filtration housing accessory distributed by CoralVue to streamline media containment inside marine reef sumps, freshwater canister filters, and all-in-one filtration compartments. Utilizing loose bulk chemical media is the most economical and effective method to polish aquarium water and remove yellowing compounds, but standard bags often cause maintenance headaches. Knot-tied string pouches can loosen under high pressure, while inferior mesh fabrics fray or stretch, spilling carbon fines into the water column. The IceCap 4in x 12in Zip Net Bag eliminates these points of failure through an integrated, professional-tier enclosure design.
The primary operational benefit of the IC-ZNB4 is its Rust-Proof Polymer Zipper System. Built completely without toxic metal zipper teeth or sliders that rust and leach toxic heavy metals into sensitive marine environments, this non-corrosive zipper provides instant access to your filter media beds. The underlying premium nylon fabric features a tight 150-micron mesh diameter, which is calculated to allow high-volume water contact while trapping intermediate and larger-sized media without any leakage. Measuring a versatile 4 inches by 12 inches, this long-lasting pouch handles routine rinsing cycles seamlessly, making it a reliable staple for professional tank maintenance.
Key Features
Eliminates Spillage and Media Tracking: The reliable plastic zipper closure seals completely shut, ensuring loose carbon or resins won't escape into the water column.
Protects Expensive Pump Impellers: Keeps granular fragments tightly locked away, preventing loose rocks or carbon chunks from lodging in active pump motors.
Streamlines Media Upkeep: The quick-zip open interface removes the frustration of undoing wet, calcified knots when replacing spent media.
(Note: This retail package includes (1) empty 4" x 12" Zip Net Media Bag with an integrated plastic zipper closure. Bulk activated carbon, GFO, and bio-ceramics are sold under separate product categories).
IceCap Zip Net Filter Media Bag Sizing Continuity
| Bag Dimensions | Factory SKU Identifier | Target Media Capacity | Recommended Filtration Placement |
|---|---|---|---|
| IceCap Zip Net Bag — 3" x 8" | IC-ZNB3 | Up to 1.5 Liters | Nano Sumps, AIO Chambers, HOB Filters |
| IceCap Zip Net Bag — 4" x 12" | IC-ZNB4 | Up to 4.0 Liters | Standard/Large Reef Sumps & Canister Filter Trays |
| IceCap Zip Net Bag — 8" x 13" | IC-ZNB8 | Up to 10.0 Liters | Commercial Sumps, Pond Filters & Trickle Towers |
What’s Included:
(1) IceCap Zip Net Media Bag (4in x 12in) with Integrated Plastic Zipper Closure
Technical Specs:
Official Manufacturing Title: IceCap Zip Net Media Bag 4inx12in
SKU / Factory Part Identifier: IC-ZNB4
Physical Pouch Dimensions: 4.0" x 12.0" (4.0in×12.0in)
Mesh Configuration Profile: 150-Micron Fine Nylon Netting (For intermediate-to-large granular media sizes)
Closure Infrastructure: Heavy-Duty Corrosion-Resistant Plastic Zipper
Material Composition: 100% Non-Toxic, Inert Nylon and Marine Polymer Blend
Chemical Treatment Resistance: Safe for use with active copper treatments, medications, and ozone
Unbox your IceCap Zip Net Media Bag and give it a thorough initial rinse under fresh RO/DI water to clear away any loose packing dust from transit.
Unzip the plastic zipper track completely. Measure your required dosage of bulk chemical filtration media (such as pelletized activated carbon, coarse GFO, or ceramic rings). Note: Ensure your media particle sizing is larger than 150 microns to prevent fine dust from slipping through the mesh lines.
Pour the dry bulk media carefully down through the open mouth of the 4" x 12" bag. Do not overstuff the bag; leave roughly 20% empty space inside so the media can shift slightly for maximum water contact.
Pull the plastic zipper slider firmly across the track until the bag is completely closed.
Place the loaded bag under your RO/DI water line to rinse out any black carbon dust or mineral fines over a utility sink before adding it to your aquarium.
Drop the zipped media bag into a high-flow section of your filtration system, such as a sump baffle lane, right beneath your filter sock drains, or inside a canister filter tray. Replace or reload the media every 2 to 4 weeks depending on your bioload.
Pro Tips:
- Leave Some Slop Space Inside the Pouch to Maximize Surface Contact. When pouring your bulk carbon or bio-media into the IC-ZNB4, resist the urge to pack it completely dense and solid to the zipper rim. If the mesh is stretched completely rigid, the inner particles will be shielded from water flow, causing water to bypass the core. Leaving a little wiggle room allows the granules to tumble and spread out flat under active water currents, ensuring every single particle can adsorb toxins.
- Knead the Bag Weekly Under Water to Dislodge Trapped Organic Slime. Even inside clean, well-baffled filtration sumps, floating organic matter and bacterial biofilms will slowly settle over your media bag over time. This layer can form a skin that blocks water contact. During your weekly water checks, simply reach into your sump and give the zipper bag a few quick squeezes and flips underwater. This loose action knocks away trapped detritus and flips the inner media around, restoring peak flow.
- Soak the Zipper in Vinegar Over Time to Prevent Calcium Scaling. While the heavy-duty plastic zipper will never rust or corrode, long-term exposure to salt creep and evaporation lines can lead to a buildup of white calcium carbonate scale inside the zipper teeth. If the zipper begins to feel stiff or hard to pull when replacing media, soak the empty bag in a small cup of white vinegar or diluted aquarium citric acid for 10 minutes. The mild acid will instantly dissolve the calcium crust, making the zipper track slide smoothly like new.