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 BioCompact
A very small internal filter for nano and quarantine tanks. It can be mounted upright or on its side, which makes it handy in shallow water, and the flow is adjustable at the outlet. The 50 has a media chamber you can refill with whatever you like.
Updated
240 L/h2 models
Will it suit my tank?
litres
Best for
Nano tanks, shrimp tanks and quarantine tanks where space is tight.
Worth knowing
Tiny media capacity means frequent rinsing, and it is visible in the tank.
What stands out
- Two sizes for tanks up to 25 or 50 litres
- Adjustable flow of roughly 120 to 240 L/h
- Can be installed horizontally for shallow water
- 5 W pump
Models and specs
| Model | Flow | Tank size | Power | Media volume | Max head | Media |
|---|---|---|---|---|---|---|
| 2519236 | 240 L/h | up to 25 L | 5 W | – | 0.4 m | Fine activated carbon foam |
| 5019235 | 240 L/h | up to 50 L | 5 W | 0.2 L | 0.4 m | Refillable chamber, supplied with carbon |
- Brand
- Oase
- Flow range
- 120 to 240 L/h, adjustable
- Mounting
- Vertical or horizontal
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 BioCompact, drawn from its specs.
What size tank is the Oase BioCompact good for?
Using the 5 to 12 times turnover rule for planted tanks: 25 (240 L/h, suits roughly 20–48 L); 50 (240 L/h, suits roughly 20–48 L). The maker rates the range for tanks up to 50 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 BioCompact best for?
Nano tanks, shrimp tanks and quarantine tanks where space is tight.
Is there anything to watch out for with the Oase BioCompact?
Tiny media capacity means frequent rinsing, and it is visible in the tank.
What are the alternatives to the Oase BioCompact?
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.