Description
xOverview
The OASE BioMaster 850 Thermo external filter combines four‑stage filtration with built‑in heating, delivering a streamlined solution for both freshwater and marine aquariums. Designed for tanks up to 225 gallons, it minimizes clutter around the display and supports stable temperatures across the water column. A thoughtfully sealed filtration pathway directs water through media in an efficient sequence, helping you achieve clear, consistent water without added equipment clutter.
Filtration design and media
Water first passes through the pre‑filter’s activated carbon foams to reduce toxins and odors, then enters the main chamber where foams of varying densities work alongside Hel‑X Biomedia. This setup provides substantial surface area for beneficial bacteria while preserving smooth, reliable flow. You can customize the pre‑filter with different pore foams—coarse 30, fine 45, and ultra‑fine 60 ppi—for a tailored balance of flow and filtration.
- 4‑stage filtration with Hel‑X Biomedia and varied-density foams for robust biofiltration
- Pre‑filter foams in coarse 30, fine 45, and ultra‑fine 60 ppi offer customization
- Hel‑X Biomedia provides high surface area to support beneficial bacteria
- Sealed filtration paths ensure water travels efficiently through media
Setup, operation, and maintenance
Setup is eased by fast priming and adjustable flow control on both the inlet and outlet. The EasyClean pre‑filter can be removed and cleaned separately, reducing maintenance time and extending filter life. Built‑in safety locking on the handle, pre‑filter, and inlet/outlet valve helps prevent spills during servicing. The unit also offers quiet operation thanks to a sound‑dampening design, so filtration remains unobtrusive in your space. For temperature control, you can pair the BioMaster 850 with an OASE HeatUp adjustable heater (not included).
Crafted with Italian manufacturing and backed by German engineering, the BioMaster 850 emphasizes reliability and efficiency in everyday use. It carries a three‑year warranty, with a free one‑year extension available upon online product registration.
- Easy priming for quick startup and continued operation
- Quiet operation with sound‑dampening design
- Heater integration capability with OASE HeatUp (heater not included)
- Adjustable inlet/outlet flow to fit your tank needs
- Safety locking features to prevent accidental spills
- Made in Italy with German engineering
What you get for your aquarium
The BioMaster 850 provides a compact, efficient filtration solution that keeps water clean and temperatures stable without adding a lot of visible gear. Its combination of robust media, customizable pre‑filters, and thoughtful safety and maintenance features makes it a versatile choice for serious hobbyists and hobbyists upgrading from smaller setups.
FAQ
Q: Is the BioMaster 850 suitable for saltwater aquariums?
A: Yes, it supports freshwater and marine setups up to 225 gallons.
Q: What maintenance features help simplify upkeep?
A: Easy priming, removable EasyClean pre-filter, and safety locks minimize spills and maintenance time.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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