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
Boyu · Internal
Boyu SP-C / SP-B Internal Filter
A submersible pump head sitting on one or two slotted sponge cartridges, which makes a simple internal filter that also aerates through a venturi. It is the classic cheap internal: effective at mechanical cleaning, easy to rinse, but bulky in a small scape.
Updated
300–1,400 L/h4 models
Will it suit my tank?
litres
Best for
Quarantine, hospital or grow-out tanks, and simple community tanks that need an easy internal filter.
Worth knowing
It is large and very visible in the tank, and the maker lists the SP-2300B with the same 8 W and 300 L/h as the small model, which looks like a sheet error.
What stands out
- Pump plus one or two sponge cylinders
- Venturi air intake for extra oxygen
- Stainless steel shaft, resin-sealed motor
- Suction-cup mounting inside the tank
Models and specs
| Model | Flow | Power | Max head | Dimensions (L × W × H) |
|---|---|---|---|---|
| SP-1000C | 300 L/h | 8 W | 0.5 m | 10.1 × 5 × 15.4 cm |
| SP-1300C | 400 L/h | 9 W | 0.5 m | 10.1 × 6 × 19.6 cm |
| SP-2300B | – | – | – | 10 × 6 × 30 cm |
| SP-2500B | 1,400 L/h | 34 W | 2 m | 14.9 × 8.5 × 34.3 cm |
- Brand
- Boyu
- Voltage
- AC 230/115 V, 50/60 Hz
- Media
- Biochemical sponge cartridges
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
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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
Dophin · Internal
FC Filter Box
- Flow
- 180–670 L/h
- Tank size
- up to 130 L
A small desktop or nano tank that needs a compact, cheap internal filter.
5 models
Frequently asked questions
Quick answers about the Boyu SP-C / SP-B Internal Filter, drawn from its specs.
What size tank is the Boyu SP-C / SP-B Internal Filter good for?
Using the 5 to 12 times turnover rule for planted tanks: SP-1000C (300 L/h, suits roughly 25–60 L); SP-1300C (400 L/h, suits roughly 33–80 L); SP-2500B (1,400 L/h, suits roughly 117–280 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 SP-C / SP-B Internal Filter best for?
Quarantine, hospital or grow-out tanks, and simple community tanks that need an easy internal filter.
Is there anything to watch out for with the Boyu SP-C / SP-B Internal Filter?
It is large and very visible in the tank, and the maker lists the SP-2300B with the same 8 W and 300 L/h as the small model, which looks like a sheet error.
What are the alternatives to the Boyu SP-C / SP-B Internal Filter?
Other filters worth comparing: Dophin 950F Series Internal Filter, Dophin F Series Internal Filter, Dophin FB Internal Filter. Add any of them to the compare table to see the specs side by side.