Dophin · Hang-on-back
A Series Hanging Filter
- Flow
- 300–500 L/h
- Tank size
- up to 100 L
A 40 to 100 litre tank where you want a simple hang-on filter you can fill with your own media.
4 models
Boyu · Hang-on-back
Boyu WF Waterfall Hang-on Filter
A simple hang-on-back filter that returns water as a wide waterfall, which keeps the surface moving and breaks up oily film. There are five sizes, from a tiny 150 L/h unit up to 720 L/h. Cheap and easy to service, but the splash does drive off CO2.
Updated
150–720 L/h5 models
Will it suit my tank?
litres
Best for
Small to medium low-tech tanks and shrimp or betta setups on a budget.
Worth knowing
The waterfall return gases off CO2, so it is not ideal on an injected tank, and Boyu gives no recommended tank sizes.
What stands out
- Five sizes from 150 to 720 L/h
- Adjustable flow
- Layered media basket in the hang-on box
- Surface skimming built in on the larger WF-2035 to 2055
Models and specs
| Model | Flow | Power | Dimensions (L × W × H) |
|---|---|---|---|
| WF-2015 | 150 L/h | 6 W | 8.5 × 9.7 × 19 cm |
| WF-2025 | 300 L/h | 11 W | 12 × 10.4 × 28.2 cm |
| WF-2035 | 300 L/h | 4.6 W | 18.4 × 9.8 × 30.1 cm |
| WF-2045 | 500 L/h | 6.5 W | 23.5 × 11.8 × 32.5 cm |
| WF-2055 | 720 L/h | 8.6 W | 26.9 × 16.2 × 36.3 cm |
- Brand
- Boyu
- Voltage
- AC 230/115 V, 50/60 Hz
- Mounting
- Hangs on the tank rim
Figures from the maker's published specifications. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
Compare with
Browse all filters
Dophin · Hang-on-back
H Series Hanging Filter
- Flow
- 190–1,000 L/h
- Tank size
- up to 200 L
A beginner tank from 25 to 200 litres where a familiar, easy hang-on filter is enough.
6 models
Dophin · Hang-on-back
SH Slim Hanging Filter
- Flow
- 150–380 L/h
- Tank size
- up to 80 L
A 20 to 80 litre tank with a lid-free top where you want surface film gone without a separate skimmer.
4 models
Oase · Hang-on-back
BioStyle
- Flow
- 350–900 L/h
- Tank size
- up to 180 L
Small planted tanks or shrimp tanks where you want easy filtration without a canister or an internal box.
3 models
Frequently asked questions
Quick answers about the Boyu WF Waterfall Hang-on Filter, drawn from its specs.
What size tank is the Boyu WF Waterfall Hang-on Filter good for?
Using the 5 to 12 times turnover rule for planted tanks: WF-2015 (150 L/h, suits roughly 13–30 L); WF-2025 (300 L/h, suits roughly 25–60 L); WF-2035 (300 L/h, suits roughly 25–60 L); WF-2045 (500 L/h, suits roughly 42–100 L); WF-2055 (720 L/h, suits roughly 60–144 L). Real flow with media and hoses is lower than the rated figure, so pick the bigger model if you are between sizes.
Who is the Boyu WF Waterfall Hang-on Filter best for?
Small to medium low-tech tanks and shrimp or betta setups on a budget.
Is there anything to watch out for with the Boyu WF Waterfall Hang-on Filter?
The waterfall return gases off CO2, so it is not ideal on an injected tank, and Boyu gives no recommended tank sizes.
What are the alternatives to the Boyu WF Waterfall Hang-on Filter?
Other filters worth comparing: Dophin A Series Hanging Filter, Dophin H Series Hanging Filter, Dophin SH Slim Hanging Filter. Add any of them to the compare table to see the specs side by side.