Boyu · Internal
SP-C / SP-B Internal Filter
- Flow
- 300–1,400 L/h
Quarantine, hospital or grow-out tanks, and simple community tanks that need an easy internal filter.
4 models
SunSun · Internal
SunSun CUP-800 UV Internal Filter
A compact internal filter pump with a UV-C lamp, rated for tanks from 250 to 750 litres depending on the lamp size. Flow is 700 L/h on all four models.
Updated
700 L/h4 models
Will it suit my tank?
litres
Best for
Mid to large tanks with green water problems.
Worth knowing
Flow is modest for the tank sizes quoted, so treat it as a UV unit rather than main filtration on big tanks.
What stands out
- 700 L/h
- 3, 5, 7 or 9 W UV-C
- Rated for 250 to 750 litres
- Internal, no plumbing
Models and specs
| Model | Flow | Tank size | Power | Max head | Dimensions (L × W × H) | Cable |
|---|---|---|---|---|---|---|
| CUP-803 | 700 L/h | up to 250 L | 14 W | 0.7 m | 7.6 × 9 × 26 cm | 1.5m |
| CUP-805 | 700 L/h | up to 350 L | 16 W | 0.7 m | 7.6 × 9 × 29 cm | 1.5m |
| CUP-807 | 700 L/h | up to 500 L | 18 W | 0.7 m | 7.6 × 9 × 26 cm | 1.5m |
| CUP-809 | 700 L/h | up to 750 L | 20 W | 0.7 m | 7.6 × 9 × 29 cm | 1.5m |
- Brand
- SunSun
- Pump
- 10 W
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 · Internal
950F Series Internal Filter
- Flow
- 470–1,550 L/h
- Tank size
- up to 300 L
A larger tank that needs strong extra circulation plus some mechanical filtration.
4 models
Dophin · Internal
F Series Internal Filter
- Flow
- 360–800 L/h
- Tank size
- up to 160 L
A mid-sized tank where you want an internal filter that tucks into a back corner.
3 models
Dophin · Internal
FB Internal Filter
- Flow
- 300–760 L/h
- Tank size
- up to 140 L
A basic community or planted tank where a simple sponge internal filter is enough.
4 models
Frequently asked questions
Quick answers about the SunSun CUP-800 UV Internal Filter, drawn from its specs.
What size tank is the SunSun CUP-800 UV Internal Filter good for?
Using the 5 to 12 times turnover rule for planted tanks: CUP-803 (700 L/h, suits roughly 58–140 L); CUP-805 (700 L/h, suits roughly 58–140 L); CUP-807 (700 L/h, suits roughly 58–140 L); CUP-809 (700 L/h, suits roughly 58–140 L). The maker rates the range for tanks up to 750 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 CUP-800 UV Internal Filter best for?
Mid to large tanks with green water problems.
Is there anything to watch out for with the SunSun CUP-800 UV Internal Filter?
Flow is modest for the tank sizes quoted, so treat it as a UV unit rather than main filtration on big tanks.
What are the alternatives to the SunSun CUP-800 UV Internal Filter?
Other filters worth comparing: Boyu SP-C / SP-B Internal Filter, Dophin 950F Series Internal Filter, Dophin F Series Internal Filter. Add any of them to the compare table to see the specs side by side.