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
Oase · Internal
Oase BioPlus
A corner internal filter with a built-in, adjustable outlet nozzle instead of a separate spray bar. The media unit unclips and lifts out while the pump stays put, which makes cleaning quick. Foam plus a fine fleece stage gives decent polishing for its size.
Updated
350–650 L/h6 models
Will it suit my tank?
litres
Best for
Small to mid-sized tanks where you want a simple internal filter that is easy to service.
Worth knowing
It sits inside the tank, so it takes up scaping space and needs hiding behind plants or hardscape.
What stands out
- Three sizes for tanks up to 50, 100 or 200 litres
- 350 to 650 L/h from 5 to 7 W
- Media unit lifts out for cleaning, pump stays in place
- Fits neatly in a rear corner with suction cups
Models and specs
| Model | Flow | Tank size | Power | Media volume | Heater | Max head | Dimensions (L × W × H) |
|---|---|---|---|---|---|---|---|
| 5019237 | 350 L/h | up to 50 L | 5 W | 0.3 L | – | 0.4 m | 12 × 11 × 21 cm |
| 10019239 | 500 L/h | up to 100 L | 6 W | 0.5 L | – | 0.6 m | 12 × 11 × 27 cm |
| 20019241 | 650 L/h | up to 200 L | 7 W | 0.7 L | – | 0.9 m | 12 × 11 × 33 cm |
| 50 Thermo19238 | 350 L/h | up to 50 L | 5 W | 0.3 L | 50 W | 0.4 m | 12 × 11 × 21 cm |
| 100 Thermo19240 | 500 L/h | up to 100 L | 6 W | 0.5 L | 100 W | 0.6 m | 12 × 11 × 27 cm |
| 200 Thermo19242 | 650 L/h | up to 200 L | 7 W | 0.7 L | 200 W | 0.9 m | 12 × 11 × 33 cm |
- Brand
- Oase
- Media
- Filter foams and fine fleece
- Outlet
- Integrated adjustable nozzle
- Mounting
- Corner, suction holders
- Thermo versions
- Available with a built-in heater (models marked Thermo), which keeps the heater out of the tank
Figures from Charterhouse Aquatics's product listing. 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 Oase BioPlus, drawn from its specs.
What size tank is the Oase BioPlus good for?
Using the 5 to 12 times turnover rule for planted tanks: 50 (350 L/h, suits roughly 29–70 L); 100 (500 L/h, suits roughly 42–100 L); 200 (650 L/h, suits roughly 54–130 L); 50 Thermo (350 L/h, suits roughly 29–70 L); 100 Thermo (500 L/h, suits roughly 42–100 L); 200 Thermo (650 L/h, suits roughly 54–130 L). The maker rates the range for tanks up to 200 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 Oase BioPlus best for?
Small to mid-sized tanks where you want a simple internal filter that is easy to service.
Is there anything to watch out for with the Oase BioPlus?
It sits inside the tank, so it takes up scaping space and needs hiding behind plants or hardscape.
What are the alternatives to the Oase BioPlus?
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.