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 XN Low Water Level Filter
An internal filter built to work in shallow water, with one, two or three stacked media sections. Every size runs the same 10 W, 800 L/h pump.
Updated
800 L/h3 models
Will it suit my tank?
litres
Best for
Shallow tanks and low water levels where a normal internal filter would suck air.
What stands out
- 800 L/h
- Works in shallow water
- 1, 2 or 3 media sections
- 0.6 m head
Models and specs
| Model | Flow | Power | Max head | Dimensions (L × W × H) | Media sections | Cable |
|---|---|---|---|---|---|---|
| XN-400 | 800 L/h | 10 W | 0.6 m | 13 × 8.5 × 14.5 cm | 1 | 1.5m |
| XN-600 | 800 L/h | 10 W | 0.6 m | 13 × 8.5 × 20 cm | 2 | 1.5m |
| XN-800 | 800 L/h | 10 W | 0.6 m | 13 × 8.5 × 25.5 cm | 3 | 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 XN Low Water Level Filter, drawn from its specs.
What size tank is the SunSun XN Low Water Level Filter good for?
Using the 5 to 12 times turnover rule for planted tanks: XN-400 (800 L/h, suits roughly 67–160 L); XN-600 (800 L/h, suits roughly 67–160 L); XN-800 (800 L/h, suits roughly 67–160 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 XN Low Water Level Filter best for?
Shallow tanks and low water levels where a normal internal filter would suck air.
What are the alternatives to the SunSun XN Low Water Level 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 XN Low Water Level Filter come in?
3 options: XN-400, XN-600, XN-800.