HW‑303B – external filter with UV for up to 400 litres
External canister filter with a 9 W UV-C lamp, rated at 1400 l/h for aquariums of 200 to 400 litres. It…
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This external filter suits hobbyists running medium-sized freshwater or marine aquariums who need mechanical, biological and chemical filtration with UV water sterilisation in a single unit. It is rated for tanks between 200 and 400 litres, with a flow rate of 1400 l/h.
Why it matters
- UV-C sterilisation: The integrated 9 W UV-C lamp is designed to sterilise the water passing through the filter.
- Intake near the substrate: The intake tube with a protective strainer draws water close to the bottom, and its length can be extended with additional segments. The strainer keeps fish, shrimp, plants and other large items out of the filter.
- Quiet operation: The pump uses a ceramic impeller and sits inside a large, sealed cover that dampens noise, while rubber feet absorb vibration.
- Leak-free servicing: The aqua-stop valve shuts off water flow from the filter to the hoses, so the hoses can be disconnected from the lid during maintenance. The lid is secured with two pairs of clamps, one lever-action for sealing and one snap-action for holding.
Specifications
- Flow rate: 1400 l/h
- Recommended tank volume: 200 to 400 l
- Power consumption: 35 W
- UV lamp power: 9 W
- External dimensions: 258 x 258 x 430 mm
- Power cable length: 1.8 m
- Body, cover and other plastic parts: ABS
- Filter media included: bio-ceramics of varying porosity, bio-balls and activated carbon
- Pump impeller: ceramic
What it works with
The HW-303B is intended for aquariums in the 200 to 400 litre range and is supplied with biological media (bio-ceramics and bio-balls) for bacterial colonisation, along with activated carbon for chemical filtration. The bio-media provide a surface for bacteria that reduce NH3, NH4 and NO2 levels, while the carbon binds metals, humic substances, pesticides and metabolic byproducts. The ceramic impeller is rated by the manufacturer for use in seawater as well as freshwater.
Technical specification
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Frequently asked questions
The filter is recommended for tanks from 200 to 400 liters and has a flow rate of 1400 l/h. A 300-liter tank falls within the recommended range.
The filter has a UV-C lamp with a power of 9 W, which sterilizes the water as it passes through. The filter's total power consumption is 35 W.
Yes, the pump uses a ceramic impeller that is designed to operate in seawater. The pump is also housed in a sealed lid that dampens its noise.
Yes, the aqua-stop valve blocks water flow from the filter into the hoses, so you can disconnect the hoses from the lid. The valve is useful during any maintenance work.
The filter comes with bio-ceramic and bio-balls for biological filtration, plus activated carbon for chemical filtration. The bio-media host bacteria that reduce NH3, NH4 and NO2 in the aquarium.
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