Oase BioMaster Impeller - 850
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Product Information
Full details
The Oase BioMaster 850 Impeller Assembly is an essential maintenance component designed for aquarium enthusiasts using Oase BioMaster or BioMaster Thermo 850 canister filters. This genuine replacement part restores optimal water flow and silent operation, making it perfect for hobbyists whose current impeller has suffered from a worn or broken ceramic axis. While it is a simple drop-in replacement, users should ensure they are ordering the specific size for the 850 model, as internal parts are not cross-compatible across the entire Oase BioMaster series.
All features
| Model Part Number | 850 |
|---|---|
| Brand | Oase |
Extended Product Information
FAQs
Is this impeller compatible with the BioMaster 600?
No, this impeller is specifically calibrated for the dimensions and flow rates of the BioMaster 850 model.
How often should I replace the impeller?
There is no fixed schedule, but you should inspect it during every deep filter clean and replace it if the ceramic shaft shows grooves or the magnet is loose.
Do I need to grease the ceramic shaft?
No, the impeller is designed to run in aquarium water, which acts as the lubricant. Do not apply oil or petroleum-based grease.
Does this come with the rubber mounts?
This package contains the rotor unit and the ceramic axis; it generally does not include the rubber grommets.
Can I use this for saltwater tanks?
Yes, the ceramic shaft and high-quality plastics used in genuine Oase parts are suitable for both freshwater and marine aquarium setups.
Troubleshooting
The filter is making a grinding noise after installation.
Ensure the ceramic shaft is fully inserted into the rubber bushing at the base of the impeller chamber.
Water flow remains weak after replacing the impeller.
Check that the impeller cover is locked securely and inspect the intake hoses for debris or airlocks.
Pros and Cons
Pros
- Ensures factory-standard filtration performance
- Easy tool-free installation
- High-quality, corrosion-resistant ceramic materials
- Restores quiet, smooth filter motor operation
Cons
- Specific to the 850 model only
- Does not include new rubber grommets or housing
- Standard wear-and-tear item requiring periodic replacement
Setup, Compatibility & Care
Installation is straightforward:
- Unplug the filter and close the shut-off valves.
- Remove the filter head from the canister.
- Twist the impeller cover to unlock it and pull out the old assembly.
- Insert the new Oase BioMaster 850 Impeller, ensuring the ceramic shaft is fully seated in the bottom and top housing guides.
Compatibility: This part is strictly compatible with the BioMaster 850 and BioMaster Thermo 850 models. Always keep your impeller housing clean of algae and biofilm, as buildup can create extra drag and shorten the lifespan of any rotor unit.