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 HJ-42 Series Internal Filter Pump
SunSun's HJ submersible pumps fitted with a sponge filter chamber, from 400 to 3,000 L/h. They can filter a tank on their own or push water through a separate filter.
Updated
400–3,000 L/h7 models
Will it suit my tank?
litres
Best for
Small to large fish tanks and temporary setups.
Worth knowing
The bigger models make strong, noisy flow for their size; the small ones suit planted tanks better.
What stands out
- Seven sizes, 400 to 3,000 L/h
- 5 to 65 W
- Sponge chamber on the intake
- 0.8 to 3 m head
Models and specs
| Model | Flow | Power | Max head | Dimensions (L × W × H) | Outlet adapters | Cable |
|---|---|---|---|---|---|---|
| HJ-542 | 400 L/h | 5 W | 0.8 m | 8 × 5.6 × 5.8 cm | 11mm | 1.5m |
| HJ-742 | 600 L/h | 8 W | 1 m | 9.8 × 6.6 × 6.8 cm | 13mm | 1.5m |
| HJ-942 | 800 L/h | 16 W | 1.3 m | 10.8 × 7.3 × 7.5 cm | 13mm | 1.5m |
| HJ-1142 | 1,000 L/h | 22 W | 1.6 m | 12.3 × 8.2 × 8.5 cm | 15mm | 1.5m |
| HJ-1542 | 1,400 L/h | 28 W | 2 m | 13.8 × 9.8 × 10 cm | 18mm | 1.5m |
| HJ-1842 | 1,800 L/h | 40 W | 2.5 m | 15.5 × 10.6 × 10.8 cm | 18mm | 1.8m |
| HJ-2042 | 3,000 L/h | 65 W | 3 m | 17.8 × 11.5 × 12 cm | 22mm | 1.8m |
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 HJ-42 Series Internal Filter Pump, drawn from its specs.
What size tank is the SunSun HJ-42 Series Internal Filter Pump good for?
Using the 5 to 12 times turnover rule for planted tanks: HJ-542 (400 L/h, suits roughly 33–80 L); HJ-742 (600 L/h, suits roughly 50–120 L); HJ-942 (800 L/h, suits roughly 67–160 L); HJ-1142 (1,000 L/h, suits roughly 83–200 L); HJ-1542 (1,400 L/h, suits roughly 117–280 L); HJ-1842 (1,800 L/h, suits roughly 150–360 L); HJ-2042 (3,000 L/h, suits roughly 250–600 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 HJ-42 Series Internal Filter Pump best for?
Small to large fish tanks and temporary setups.
Is there anything to watch out for with the SunSun HJ-42 Series Internal Filter Pump?
The bigger models make strong, noisy flow for their size; the small ones suit planted tanks better.
What are the alternatives to the SunSun HJ-42 Series Internal Filter Pump?
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.