1. Entwodiksyon
The OASE BioMaster 250 is an external canister filter designed for aquariums up to 70 gallons (250 liters). This filter provides multi-stage filtration to maintain optimal water quality and clarity in both freshwater and marine environments. Its design emphasizes ease of maintenance and quiet operation.
This manual provides detailed instructions for the safe and efficient installation, operation, and maintenance of your OASE BioMaster 250 filter. Please read all instructions carefully before use and retain this manual for future reference.
2. Enfòmasyon sou Sekirite
- Always disconnect power to the filter and any other aquarium equipment before performing maintenance or handling the filter.
- Ensure the filter is placed on a stable, level surface below the aquarium water level to facilitate proper operation and priming.
- Pa sèvi ak filtè a si kòd kouran an oswa ploge a domaje.
- Aparèy sa a fèt pou itilize andedan kay la sèlman.
- Kenbe soti nan atenn timoun yo.
- Follow all directions included in the package.
3. Pwodwi souview
The OASE BioMaster 250 external filter integrates several key features for effective aquarium filtration:
- Multi-stage Filtrasyon: Combines biological, mechanical, chemical, and prefiltration stages.
- EasyClean Pre-Filter Module: A removable pre-filter for quick and easy cleaning without disassembling the main filter.
- Hel-X Biomeida: Suspended filter media designed to provide a large settlement surface for beneficial microorganisms, aiding in nutrient reduction and toxin removal.
- Sealed Filtration Pathway: Ensures water flows efficiently through all filtration stages.
- Heater Integration Capability: Allows for the integration of an OASE HeatUp adjustable heater (sold separately) directly into the canister.
- Operasyon trankil: Fèt pou fè mwens bri pandan w ap itilize li.

Figure 3.1: The OASE BioMaster 250 external aquarium filter, showcasing konsepsyon kontra enfòmèl ant li yo ak aksan ble li yo.

Figi 3.2: Top view of the OASE BioMaster 250 filter head, showing the inlet/outlet adapters and priming button.

Figi 3.3: Plis paseview of key features including 4-year guarantee, 70-gallon capacity, German engineering, and Italian manufacturing.

Figi 3.4: Detaye view of the EasyClean Pre-Filter Module, Hel-X Biomeida, and the integrated heater slot.

Figi 3.5: Dyagram ki ilistre 4-s yotage filtration process within the BioMaster filter, showing water flow through pre-filter, mechanical, biological, and chemical media.
4. Enstalasyon ak Enstalasyon
Before beginning installation, ensure all components are present and undamaged. The package includes the aquarium filter with filter media, tubing, intake and outflow tubes, diffuser, spray bar, fittings, heater adapter, and power cable.

Figure 4.1: All components included with the OASE BioMaster 250 filter, such as tubing, intake/outflow pipes, and various fittings.
4.1 Asanblaj Konpozan
- Prepare Filter Media: Ensure all filter media (pre-filter foams, biological media, chemical media) are correctly placed in their respective baskets within the filter canister. Refer to the internal diagrams for correct layering.
- Konekte kawotchou: Attach the intake and outflow hoses to the filter head unit. Secure them with the provided fittings.
- Install Intake and Outflow Tubes: Place the intake tube (with strainer) and outflow tube (with diffuser or spray bar) inside the aquarium. Secure them to the aquarium rim using suction cups or clips.
- Position the Filter: Place the filter canister on a stable surface below the aquarium water level. This is crucial for proper water flow and self-priming.
4.2 Priming the Filter
The BioMaster 250 features a self-priming function for easy startup:
- Ensure all hose connections are secure and the filter is positioned correctly.
- Open the inlet and outlet valves on the filter head.
- Press the priming button (usually located on top of the filter head) repeatedly until water begins to flow into the filter and fill the canister. This may take several presses.
- Once water fills the canister and flows through the outflow tube, connect the power cable to an electrical outlet. The filter pump will start, and water circulation will begin.

Figure 4.2: A person adjusting the OASE BioMaster filter placed inside an aquarium cabinet, demonstrating typical installation below the tank.
5. Operasyon Enstriksyon
Once installed and primed, the OASE BioMaster 250 operates continuously to filter your aquarium water.
- Ajisteman koule: The inlet and outlet adapters feature flow control levers. These can be adjusted to regulate the water flow rate according to your aquarium's needs.
- Diffuser/Spray Bar: The included diffuser or spray bar can be used to create uniform surface movement and enhance dissolved oxygen levels in the aquarium.
- Entegrasyon Chofaj (Si ou vle): If you have an OASE HeatUp adjustable heater, it can be integrated into the filter canister for a cleaner aquarium aesthetic. Follow the heater's specific instructions for installation into the BioMaster.

Figure 5.1: The OASE BioMaster filter demonstrating the optional integration of a HeatUp heater into the canister for efficient heating and a tidy setup.
6. Antretyen
Regular maintenance is essential for the optimal performance and longevity of your OASE BioMaster 250 filter.
6.1 EasyClean Pre-Filter Module Cleaning
The EasyClean pre-filter module allows for quick cleaning without opening the main filter canister:
- Dekonekte pouvwa: Always unplug the filter from the power outlet before any maintenance.
- Remove Pre-Filter Module: Unlock and carefully pull out the pre-filter module from the top of the filter head.
- Rinse Foams: Remove the pre-filter foams and rinse them thoroughly under running aquarium water (or dechlorinated tap water) until clean. Avoid using untreated tap water as it can harm beneficial bacteria.
- Remonte: Place the cleaned foams back into the module and reinsert the module into the filter head, ensuring it locks securely.
- Rekonekte pouvwa: Plug the filter back into the power outlet.
This pre-filter should be cleaned every 1-2 weeks, depending on aquarium bioload and debris accumulation.

Figure 6.1: A hand demonstrating the removal of the EasyClean Pre-Filter Module from the top of the OASE BioMaster filter for routine cleaning.
6.2 Full Filter Cleaning (Main Canister)
The main filter canister, including biological and chemical media, requires less frequent cleaning, typically every 3-6 months or as needed based on flow reduction.
- Dekonekte pouvwa: Unplug the filter.
- Engage Aquastop: Close the inlet and outlet valves on the filter head. The aquastop mechanism allows you to disconnect the hose assembly without water leakage, keeping the tubes in the aquarium.
- Remove Filter Head: Release the locking clips and carefully lift the filter head from the canister.
- Clean Media Baskets: Remove the media baskets. Rinse mechanical filter foams and biological media in old aquarium water to preserve beneficial bacteria. Replace chemical media (e.g., activated carbon) as recommended by the manufacturer, typically monthly.
- Clean Canister and Impeller: Clean the inside of the canister and inspect the impeller for debris.
- Remonte: Reassemble the media baskets, ensuring they are correctly stacked. Secure the filter head onto the canister, ensuring all clips are locked.
- Reconnect Hoses and Prime: Reconnect the hose assembly, open the valves, and prime the filter as described in Section 4.2.
- Rekonekte pouvwa: Plug the filter back in.

Figure 6.2: The aquastop feature on the OASE BioMaster filter, allowing for easy disconnection of hoses from the filter head without water spillage during maintenance.
NAN. Depanaj
This section addresses common issues you might encounter with your OASE BioMaster 250 filter.
| Pwoblèm | Kòz posib | Solisyon |
|---|---|---|
| Pa gen koule dlo oswa koule redwi |
|
|
| Filter is noisy or vibrating |
|
|
| Dlo flit |
|
|
| Air purging into the tank (bubbles) |
|
|
8. Espesifikasyon
| Karakteristik | Detay |
|---|---|
| Non modèl | BioMèt 250 |
| Nimewo Modèl Atik | 55145 |
| Mak | OASIS |
| Tank Volume Capacity | Up to 70 Gallons (250 Liters) |
| Dimansyon (LxWxH) | 9.4 x 9.4 x 14.6 pous |
| Pwa atik | 11.2 liv |
| Materyèl | Plastik |
| Koulè | Nwa |
| Peyi orijin | Itali |
| Karakteristik espesyal | EasyClean pre-filter module |
| UPC | 706759551458 |
9. Garanti ak sipò
The OASE BioMaster 250 comes with a 3-ane garanti limiteYon lòt 1-ane ekstansyon garanti is available upon online product registration. Please refer to the official OASE website or the documentation included in your product packaging for detailed warranty terms and conditions.
For technical support, spare parts, or warranty claims, please contact OASE customer service. Contact information can typically be found on the OASE websit oswa nan anbalaj pwodwi a.
Enskripsyon pwodwi sou entènèt: Vizite OASE ofisyèl la website to register your product and activate your warranty extension.





