SUNSUN HW-303B Outside Filter UV External Canister Filter Water Filters for Aquarium Fresh and Sea Water

Technical specifications

Customization guide

Adjustable flow rate settings and modular filter media compartments let users customize filtration intensity to match tank size, stocking levels, or specific species needs. The UV sterilization lamp’s intensity can also be optimized for smaller or larger water volumes.

Get inspired

With its UV sterilization and dual-stage filtration, the SUNSUN HW-303B ensures crystal-clear water and a healthy environment for delicate marine life. Whether you’re maintaining a nano reef tank or a community freshwater setup, its adaptable design and quiet operation make it an ideal partner for long-term aquarium success.

Choose your model

Supplier's note

1. Technical Breakthroughs:

   • UV Sterilization: The Pro Model’s 25W UV lamp eliminates 99.9% of pathogens, surpassing industry benchmarks for disease prevention.
   • Dual Filtration: Combining mechanical debris capture with biological bacteria colonization creates a self-sustaining ecosystem.
   • Adjustable Flow: Users can fine-tune water circulation to match sensitive species like bettas or high-stress marine fish.

2. Version Selection Guide:

   • Base Model: Ideal for small to medium freshwater tanks (≤60cm) with low stocking density. Its quiet operation suits bedrooms or offices.
   • Advanced Model: Best for larger freshwater/saltwater setups (≤100cm) needing higher flow rates and stronger pathogen control.
   • Pro Model: Designed for professional aquarists or large-scale systems (≥120cm), offering unmatched sterilization and energy efficiency. For example, the Pro’s 25W UV lamp paired with its 30% quieter design enables safe, low-stress maintenance of delicate coral reefs.