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 HQJ-I and HQJ-S Internal Filter
Internal filters with a sponge column and pump head, from 300 to 500 L/h. S models add a taller filter section.
Updated
300–500 L/h5 models
Will it suit my tank?
litres
Best for
Small fish tanks and quarantine tanks.
What stands out
- 300 to 500 L/h
- 3 to 12 W
- I and S body styles
- Sponge columns
Models and specs
| Model | Flow | Power | Max head | Dimensions (L × W × H) | Cable |
|---|---|---|---|---|---|
| HQJ-700I | 400 L/h | 8 W | 0.8 m | 6.5 × 14.5 × 21.8 cm | 1.5m |
| HQJ-900I | 500 L/h | 12 W | 1 m | 6.5 × 13.2 × 23 cm | 1.5m |
| HQJ-500S | 300 L/h | 3 W | 0.6 m | 5.5 × 16 × 9.9 cm | 1.5m |
| HQJ-700S | 400 L/h | 8 W | 0.7 m | 6.5 × 16 × 36.5 cm | 1.5m |
| HQJ-900S | 500 L/h | 12 W | 1 m | 6.5 × 13.2 × 37.5 cm | 1.5m |
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 HQJ-I and HQJ-S Internal Filter, drawn from its specs.
What size tank is the SunSun HQJ-I and HQJ-S Internal Filter good for?
Using the 5 to 12 times turnover rule for planted tanks: HQJ-700I (400 L/h, suits roughly 33–80 L); HQJ-900I (500 L/h, suits roughly 42–100 L); HQJ-500S (300 L/h, suits roughly 25–60 L); HQJ-700S (400 L/h, suits roughly 33–80 L); HQJ-900S (500 L/h, suits roughly 42–100 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 HQJ-I and HQJ-S Internal Filter best for?
Small fish tanks and quarantine tanks.
What are the alternatives to the SunSun HQJ-I and HQJ-S 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.
What sizes does the SunSun HQJ-I and HQJ-S Internal Filter come in?
5 options: HQJ-700I, HQJ-900I, HQJ-500S, HQJ-700S, HQJ-900S.