Main Gasket for BioMaster & BioMaster Thermo – lid gasket
Replacement main lid gasket for OASE BioMaster and BioMaster Thermo filters, compatible with…
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Find a productProduct description
This spare main gasket is for hobbyists running an OASE BioMaster or BioMaster Thermo filter who need to replace a worn or leaking seal. It fits the 250, 350, 600 and 850 sizes of both models, as well as the BioMaster 2 and BioMaster 2 Thermo in the same sizes.
Why it matters
- It creates a watertight connection between the main parts of the filter, which is the function that prevents water from escaping the unit.
- It is made from durable, chemical-resistant materials, so it holds up to long-term contact with water and filter conditioners.
- The manufacturer recommends regular replacement to keep the filter performing at full capacity and the system stable.
- Replacing the seal on schedule supports consistent water clarity in the aquarium or pond the filter serves.
Specifications
- Product type: main gasket for filter lid
- Compatible models: BioMaster 250, 350, 600, 850; BioMaster Thermo 250, 350, 600, 850; BioMaster 2 250, 350, 600, 850; BioMaster 2 Thermo 250, 350, 600, 850
- Weight: 0.01 kg
- Symbol: USZCZELKA POKRYWY DO BIOMASTERA
- EAN: 4010052451480
What it works with
The gasket is designed for the OASE BioMaster and BioMaster 2 filter lines, in both standard and Thermo versions, across the four listed sizes. Check the model size on your filter before ordering, since the listed compatibility covers only these specific variants. It is a filter part for aquarium and pond systems, not a standalone accessory.
Technical specification
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Frequently asked questions
It fits the 250, 350, 600 and 850 sizes of the BioMaster, BioMaster Thermo, BioMaster 2 and BioMaster 2 Thermo filters. Check that your filter model and size appear on this list before ordering.
It seals the connection between the main parts of the filter, which prevents water from leaking out. The supplier notes that the seal is essential for the filter to work correctly.
The supplier describes it as made from durable materials that are resistant to chemicals. No further material specification is provided in the product data.
Use the product symbol USZCZELKA POKRYWY DO BIOMASTERA or EAN code 4010052451480 to identify it. The EAN is useful for matching the exact item against your existing part.
The supplier recommends regular replacement of the gasket to keep the filter at full efficiency and the water clean. The product data does not give a specific replacement interval, so inspect the seal for wear as part of routine maintenance.
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