4-in-1 Acrylic Aquarium External Filter Box | Dry & Wet

4-in-1 Acrylic Fish Tank External Filter Box with Dry & Wet Separation

Upgrade your aquarium's water quality with this versatile 4-in-1 acrylic external filter box. Designed to hang silently on the outside of your fish tank, this compact unit keeps the interior of your aquarium clean and clutter-free while delivering multi-stage mechanical and biological filtration. Whether you're keeping freshwater fish, marine species, or breeding tank residents, this filter box is an efficient and space-saving solution.

Key Features

• High-transparency acrylic construction — 100% brand new, crystal-clear material lets you monitor filter media at a glance without disturbing your aquascape.
• External hang-on design — Mounts on the outside of the tank to maximize interior swimming space for your fish.
• Dry & wet separation chamber — Internal partitions separate filter media into sections, allowing simultaneous mechanical, biological, and chemical filtration stages.
• Compact body, large capacity — Accommodates a wide variety of filter media including sponge, bio-balls, activated carbon, and ceramic rings.
• Multi-stage drip overflow system — Water cascades through each media chamber for thorough, efficient filtration before returning to the tank.
• Quiet operation — Smooth overflow flow path minimizes noise for a peaceful aquarium environment.
• Doubles as an isolation/breeding box — The internal partition can be used to safely separate fry, injured, or breeding fish.
• Available in Small, Medium, and Large sizes to suit different tank setups.

Specifications

• Material: High-transparency acrylic
• Color: Transparent
• Sizes Available: Small / Medium / Large
• Compatible Filter Media: Sponge, bio-balls, ceramic rings, activated carbon (sold separately)

⚠️ Note: This filter box must be used in combination with filter media and a submersible pump. These items are not included and must be purchased separately.

Please allow 1–3 cm variance due to manual measurement. Colors may appear slightly different on-screen than the actual product due to monitor settings and lighting conditions.

Package Contents

• 1 × Fish Tank External Filter Box (Small, Medium, or Large — per selection)

Made in China.

For general guidance on setting up a healthy aquarium environment, visit the U.S. Consumer Product Safety Commission (CPSC) for product safety information on home aquarium equipment.

Frequently Asked Questions

Q: Does this acrylic external filter box come with a pump or filter media?

A: No — the filter box is sold on its own. You will need to purchase a compatible submersible pump and your preferred filter media (such as sponge, bio-balls, ceramic rings, or activated carbon) separately to complete the setup.

Q: Can this external filter box be used as a breeding or isolation box?

A: Yes! The internal partitions can be repurposed to create a separate isolation zone within the same unit, making it ideal for breeding fish, protecting fry, or separating aggressive tank inhabitants.

Q: Is the acrylic filter box suitable for both freshwater and saltwater aquariums?

A: The high-transparency acrylic material is durable and compatible with both freshwater and marine (saltwater) aquarium setups. Always ensure the filter media you choose is appropriate for your specific water type.

Q: How do I choose the right size — Small, Medium, or Large?

A: Choose based on your tank's wall thickness and volume. The Small size suits nano or desktop tanks, the Medium fits standard home aquariums, and the Large is recommended for bigger setups requiring higher filtration capacity. Check the product variant dimensions before ordering.