Aquarium External Canister Filter SUNSUN HW-303B 9W UV Sterilizer 370 GPH

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Aquarium External Canister Filter SUNSUN HW-303B 9W UV Sterilizer 370 GPH

External 3+1 stage canister filter with built in UV sterilizer. Filter is capable of handling up to 370 gallons per hour with 3 flexible media trays that allow you to add your media of choice.  The HW-303B has a built in 9 Watt UV sterilizer to help kill algae spores and bacteria, promoting crystal clear water.  The filter is easy to set up, maintain and clean. It provides mechanical, chemical and biological filtration.

Three options available:



Filter Only

Filter (only media are 3 pieces of white pads)

Filter + Media

(Filter with necessary media for you to start with)


Everything in “Filter Only”, plus:

1 Blue coarse filter sponge

1 bag of ceramic rings in mesh media bag

20 pieces of bio-balls

Filter + Premium Package

(Enhanced media for better filtration w/ spare UV bulb)


Filter media:

1 bag (500g) of ceramic rings in mesh media bag

40 pieces of bio-balls

Filter pads:

4x White fine filter pads

3x Blue coarse filter sponge

 What’s more:

1x Replacement 9W UV bulb

(Lies in the first media tray)





  • Good for up to 100 gallon fish tanks
  • Max Flow Rate: 370 GPH (1400L/h)
  • Built-in 9W UV sterilizer to kill viruses and harmful parasites
  • 3 stage filtration
  • Includes all hoses and everything necessary to get started
  • Easy installation, no messy assembly
  • 110-120V 50-60Hz, 35 W
  • Adjustable-height inlet tube fits even the deepest aquariums

DIMENSION: 10 X 10 X 17 inches (L x W x H)


(1) Height adjustable inlet tube with extension and strainer

(1) Multi-directional outlet system with spray-bar, outlet nozzle, flow adjustment valve, venture air intake, and suctions cups,

(1) Filtration plastic web,

(3) Filtration baskets with separation grids,

(2) 5 feet lengths of flexible tubing,

(2) 9 Watt UV Lamp

(4) white-fine Pad Cottons pads 

(3) Blue coarse filter sponges


Please note: Every filter has been filled with water to test water-tightness before leaving the factory.  So there usually is some water in the filter.  This is normal.