Boyu · Hang-on-back
WF Waterfall Hang-on Filter
- Flow
- 150–720 L/h
Small to medium low-tech tanks and shrimp or betta setups on a budget.
5 models
Dophin · Hang-on-back
Dophin SH Slim Hanging Filter
A slim hang-on-back filter only 5 cm deep, with the motor down on the intake tube and a floating surface skimmer built into the intake. Sizes differ mainly in how many standard carbon cartridges they hold.
Updated
150–380 L/h4 models
Will it suit my tank?
litres
Best for
A 20 to 80 litre tank with a lid-free top where you want surface film gone without a separate skimmer.
Worth knowing
The cartridges contain carbon, which you may prefer to replace with sponge in a fertilised planted tank, and the spill-over outlet gasses off some CO2.
What stands out
- Only 5 cm deep behind the tank
- Built-in floating surface skimmer clears surface film
- Uses 1 to 4 identical cartridges
- Flow control on the outlet
Models and specs
| Model | Flow | Tank size | Power | Dimensions (L × W × H) | Cartridges |
|---|---|---|---|---|---|
| SH-20051 0143 | 150 L/h | up to 20 L | 2.8 W | 16 × 5 × 20 cm | 1 |
| SH-25051 0144 | 250 L/h | up to 40 L | 4 W | 18 × 5 × 22 cm | 2 |
| SH-28051 0145 | 280 L/h | up to 60 L | 4.1 W | 22 × 5 × 24 cm | 3 |
| SH-38051 0146 | 380 L/h | up to 80 L | 4 W | 28.8 × 5 × 24.3 cm | 4 |
- Brand
- Dophin
- Figures quoted
- 230 V / 50 Hz version
- Surface skimming
- Floating de-oiler on the intake
- Cartridges
- One standard size across the range
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
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
SunSun · Hang-on-back
CBG Hang-On Filter with UV
- Flow
- 500–800 L/h
- Tank size
- 38–190 L
Small to mid planted tanks that suffer from surface film or green water.
4 models
SunSun · Hang-on-back
HBL Series Hang-On Filter
- Flow
- 300–800 L/h
Nano and small planted tanks, shrimp tanks and quarantine setups.
12 models
Frequently asked questions
Quick answers about the Dophin SH Slim Hanging Filter, drawn from its specs.
What size tank is the Dophin SH Slim Hanging Filter good for?
Using the 5 to 12 times turnover rule for planted tanks: SH-200 (150 L/h, suits roughly 13–30 L); SH-250 (250 L/h, suits roughly 21–50 L); SH-280 (280 L/h, suits roughly 23–56 L); SH-380 (380 L/h, suits roughly 32–76 L). The maker rates the range for tanks up to 80 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 Dophin SH Slim Hanging Filter best for?
A 20 to 80 litre tank with a lid-free top where you want surface film gone without a separate skimmer.
Is there anything to watch out for with the Dophin SH Slim Hanging Filter?
The cartridges contain carbon, which you may prefer to replace with sponge in a fertilised planted tank, and the spill-over outlet gasses off some CO2.
What are the alternatives to the Dophin SH Slim Hanging Filter?
Other filters worth comparing: Boyu WF Waterfall Hang-on Filter, Oase BioStyle, SunSun CBG Hang-On Filter with UV. Add any of them to the compare table to see the specs side by side.