OASE Replacement Impeller for BioMaster 850 and BioMaster Thermo 850 (87124)

The OASE Replacement Impeller (87124) is a genuine OEM replacement impeller assembly designed specifically for the OASE BioMaster 850 and BioMaster Thermo 850 external canister filters, and also compatible with the next-generation BioMaster² 850 (94697) and BioMaster² Thermo 850 (94677). The impeller is the rotating component at the heart of the filter motor head that generates the water flow driving all filtration through the filter media.

When the impeller becomes worn, chipped, or damaged, the filter can develop reduced flow, increased noise, vibration, or stop circulating water altogether. Replacing with a genuine OASE OEM impeller restores full pump output and filter performance — at a fraction of the cost of replacing the entire filter unit.

Key Features

• Genuine OASE replacement part: Exact OEM fit for the BioMaster 850, BioMaster Thermo 850, BioMaster² 850, and BioMaster² Thermo 850 — no compatibility guesswork
• Restores full pump flow and filter performance: A worn or damaged impeller is the most common cause of reduced flow, noise, and vibration — replacement restores full rated performance
• Robust impeller design: High-quality construction built to OASE's standards for reliable, long-lasting pump operation
• Easy to replace: Straightforward component swap during routine filter maintenance — no specialist tools required
• Genuine OASE quality: Manufactured to OASE's standards for reliable, long-lasting performance
• 1 impeller assembly per pack

Compatibility

• Compatible with:
  • OASE BioMaster 850 (model 77116)
  • OASE BioMaster Thermo 850 (model 77118)
  • OASE BioMaster² 850 (model 94697)
  • OASE BioMaster² Thermo 850 (model 94677)
• Not compatible with: BioMaster 250, 350, or 600 models — each uses a different impeller

Product Details

• Brand: OASE
• Product Code: 87124
• Type: Replacement Impeller Assembly
• Compatibility: OASE BioMaster 850 / BioMaster Thermo 850 / BioMaster² 850 / BioMaster² Thermo 850
• Quantity: 1 impeller assembly

This replacement impeller is suitable for any aquarium keeper running an OASE BioMaster 850 or BioMaster Thermo 850 external canister filter who needs to restore full pump flow and quiet filter performance.