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
SunSun · Hang-on-back
SunSun CBG Hang-On Filter with UV
A hang-on-back filter with an oil-film surface skimmer, double flow regulation and a built-in 5 W UV-C lamp (S models skip the UV). Two sizes for 38 to 190 litre tanks.
Updated
500–800 L/h4 models
Will it suit my tank?
litres
Best for
Small to mid planted tanks that suffer from surface film or green water.
Worth knowing
UV kills free-floating algae but will not fix algae on plants or glass; the root cause still needs sorting.
What stands out
- 500 or 800 L/h
- Built-in 5 W UV-C (non-S models)
- Surface skimmer intake
- Rated for 38 to 190 litres
Models and specs
| Model | Flow | Tank size | Power | Dimensions (L × W × H) |
|---|---|---|---|---|
| CBG-500 | 500 L/h | 38–115 L | 6 W | 19.2 × 11.1 × 16.5 cm |
| CBG-500S | 500 L/h | 38–115 L | 6 W | 19.2 × 11.1 × 16.5 cm |
| CBG-800 | 800 L/h | 75–190 L | 6 W | 22.9 × 12.8 × 17.9 cm |
| CBG-800S | 800 L/h | 75–190 L | 6 W | 22.9 × 12.8 × 17.9 cm |
- Brand
- SunSun
- Also sold as
- ZBG-500 and ZBG-800 (Zhizhen line)
- Skimmer
- Built-in oil-film intake
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
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
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
Frequently asked questions
Quick answers about the SunSun CBG Hang-On Filter with UV, drawn from its specs.
What size tank is the SunSun CBG Hang-On Filter with UV good for?
Using the 5 to 12 times turnover rule for planted tanks: CBG-500 (500 L/h, suits roughly 42–100 L); CBG-500S (500 L/h, suits roughly 42–100 L); CBG-800 (800 L/h, suits roughly 67–160 L); CBG-800S (800 L/h, suits roughly 67–160 L). The maker rates the range for tanks up to 190 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 SunSun CBG Hang-On Filter with UV best for?
Small to mid planted tanks that suffer from surface film or green water.
Is there anything to watch out for with the SunSun CBG Hang-On Filter with UV?
UV kills free-floating algae but will not fix algae on plants or glass; the root cause still needs sorting.
What are the alternatives to the SunSun CBG Hang-On Filter with UV?
Other filters worth comparing: Boyu WF Waterfall Hang-on Filter, Dophin A Series Hanging Filter, Dophin H Series Hanging Filter. Add any of them to the compare table to see the specs side by side.