Reusable Filter Media Bag

Rust-Free Cotton Drawstring Closure

Forget corroded zippers—this media bag features a 100% metal-free cotton cord that secures contents gently, making it safe for shrimp, coral reefs, and delicate aquatic life.

Fine Filter Cotton for Micro Debris

High-density fiber captures even tiny particles without restricting water flow. Ideal for maintaining crystal-clear conditions in both freshwater and saltwater tanks.

Compatible with All Filter Media

Versatile enough to hold activated carbon, ceramic rings, zeolite, resin, or bio balls—fits seamlessly into canisters, sumps, trickle filters, and pond systems.

Oxygen-Flow Mesh Backing

The breathable knit back panel promotes water and air circulation, minimizing dead zones and encouraging healthy bacterial growth for better bio-filtration.

Generously Sized & Eco-Friendly

At 13.8 × 7.9 inches, it’s large enough for most filtration systems yet easy to cut and resize. Rinse and reuse to reduce waste and save on media bags.

Frequently Asked Questions

Q1. Will the cotton fabric degrade in saltwater?
A1. No, it’s saltwater-safe and reinforced to resist breakdown—ideal for reef and marine tanks.

Q2. How often should I rinse the bag?
A2. Clean during each media change (usually every 2–4 weeks) or whenever flow slows.

Q3. Can I cut it to size?
A3. Yes! Trim to fit with scissors and re-tie the drawstring—edges won’t fray excessively.

Q4. Will it hold up to high pond flow rates?
A4. Definitely. The breathable mesh resists clogging and holds strong under continuous pond use.

Q5. Does it fit canister filters?
A5. Yes! Easily folds to fit inside most brands including Fluval, Eheim, SunSun, and more.