Reef Casa Large Filter Bags 2pk — Hand-Sewn Nylon 25x12 cm Carbon GFO Aquarium - Reef Casa

The Reef Casa Large Filter Bags (2 pack) are hand-sewn nylon bags designed to hold activated carbon, GFO (granular ferric oxide), or any other bulk filter media in your reef aquarium. Each pack contains 2 large-sized bags (25 x 12 cm) with integrated sewn drawstrings for a tight seal and easy removal from the filtration chamber. Compatible with all Reef Casa all-in-one aquariums and any standard sump.

Key Benefits

• Hand-sewn Nylon: Fine mesh retains filter media while allowing optimal water flow.
• Integrated Drawstrings: Easy pull and tight closure — sewn drawstrings prevent media from escaping into the aquarium.
• Large Size: 25 x 12 cm — large enough to hold a generous amount of carbon, GFO, or absorbent resin.
• Versatile: Compatible with activated carbon, GFO, Purigen, PhosGuard, resins, and all other bulk filter media.
• 2 Bags Per Pack: Keep one clean while the other is in use for easy rotation.

Technical Specifications

• Contents: 2 filter bags
• Dimensions: 25 cm x 12 cm (large size)
• Material: Hand-sewn nylon
• Closure: Integrated sewn drawstrings
• Compatibility: Activated carbon, GFO, Purigen, PhosGuard, resins, and all bulk filter media

Usage

Fill the filter bag with your chosen media (activated carbon, GFO, resin) and tighten the drawstring. Rinse the filled bag under fresh water to remove fine dust from the media. Place the bag in the rear filtration chamber of your Reef Casa aquarium or in your sump. Replace activated carbon every 1-2 weeks and GFO according to the manufacturer's recommendations for the media used.

Why Choose These Bags from ReefSolution

Complete your filtration system with compatible products available at ReefSolution:

• Reef Casa Bacteria Hotel Blocks — Biofiltration blocks to complement chemical filtration with biological filtration.
• Reef Casa Studio 12 Mark II — All-in-one nano reef aquarium with compatible filtration chamber.
• Reef Casa Laguna 24 — Shallow lagoon aquarium with a rear chamber for filter media.

Frequently Asked Questions

Are Reef Casa filter bags reusable?

Yes. The nylon bags can be rinsed with fresh water and reused multiple times. Replace them when the nylon starts to tear or the drawstrings no longer close properly.

What is the difference between Small and Large sizes?

The Small size measures 10 x 12 cm and is suitable for small pico aquariums or smaller amounts of media. The Large size measures 25 x 12 cm and is suitable for nano and medium aquariums requiring more filter media.

What filter media should I use in Reef Casa bags?

The bags are compatible with all bulk filter media: activated carbon (most common for clarifying water), GFO (for reducing phosphates), Purigen (for removing organic compounds), PhosGuard, and ion exchange resins.