Aquarium External Pre-Filter Barrel, Non-Powered In-Line Mechanical Filter for Fish Tanks, Extends Main Filter Life, Freshwater & Saltwater, 3 Sizes (Requires Main Filter or Pump)

Setup Note: This pre-filter works in line with a main canister/filter or a submersible pump (not included). Please follow the picture instructions to connect before use.

Efficient Filtration: High-quality sponge traps food bits, waste, and fine debris before they reach your main filter—improving water clarity and helping extend maintenance intervals.

External, Easy-Service Design: Mounts outside the tank so you can swap or rinse the sponge without getting hands in the water—less disturbance to fish, cleaner look for display aquariums.

Versatile & Scalable: Suitable for freshwater and saltwater setups and a wide range of tank styles. Place it before your canister or pump to protect impellers and reduce clogging; run multiple units for heavier bioloads.

Reusable Media, Simple Care: Rinse the sponge in tank water during water changes and reuse many times to maintain strong flow and stable bio-balance, while lowering replacement frequency and upkeep cost.

Three Sizes Available: Choose Small/Medium/Large based on tank flow and stocking level; combine with your existing filtration to tailor performance to your aquarium.