Search  for anything...
OASE

OASE BioMaster External Filter for Aquariums Up to 160 Gallons, Multi-Stage Filtration, Easy Maintenance Prefilter, Quiet Canister Filter, German Engineering

  • Based on 108 reviews
Condition: New
Checking for product changes
$259.99 Why this price?
Save $39.01 was $299.00

Buy Now, Pay Later

As low as $43.33 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Jun 3
Order within 7 hours and 52 minutes
Available payment plans shown during checkout

Recently Viewed

Style: Biomaster 600


Features

  • External filter operates quietly to circulate and filter your aquarium water
  • Includes 4-stage filtration: biological, mechanical, chemical, and prefiltration
  • Hel-x, suspended filter media, creates the optimal surface area for beneficial bacteria growth
  • The sealed filtration pathway allows you to get the full benefits from all 4-stages of filtration
  • The easy clean prefilter module can be removed separately from the rest of the filter for simple cleaning and to extend the life of your filter

Description

The biomaster line of premium external filters are perfect for marine and freshwater aquariums. The biomaster 600 boasts 4-stage filtration in a compact design. Biological, mechanical, chemical, and prefiltration all work together to provide your aquarium with optimal water quality and clarity. The biomaster filters are designed with sealed filtration pathways to ensure water flow is getting the full benefits of prefiltration, filter media for clearer water, hel-x biomedia provide a large protected settlement surface for microorganisms, and activated carbon for ideal nutrient reduction and removal of toxins. The easy clean pre-filter module can be removed and cleaned separately from the rest of the filter for high efficiency and to extend the life of your filter. The water flow Can easily be adjusted on both the inlet and outlet adapters for the filter. Created for convenient placement under the aquarium. Install the included diffuser and spray bar for uniform surface movement and additional dissolved oxygen for ideal water quality. This filter Also features a N handle for simple moving and maintenance. This energy- efficient design includes a self-priming function for easy operation on startup and after cleaning. Includes a shut-off automation with built-in check valve to prevent leakage when cleaning the filter. Designed using German engineering and manufactured in Italy, this quiet operating filter is supported by an included 3 year warranty with a free 1 year warranty extension with online product to customize your pre-filter by combining coarse, Fine, ultra Fine, and activated carbon filter foams.

Brand: OASE


Special Feature: Hel-x, suspended filter media


Product Dimensions: 9.4"L x 19"W x 9.4"H


Package Information: Box


Installation Type: Freestanding


Power Source: Adapter


Model Name: 55147


UPC:


Global Trade Identification Number: 72


Manufacturer: OASE


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 9.4 x 19 x 9.4 inches; 13.2 Pounds


Manufacturer recommended age ‏ : ‎ 1 month and up


Item model number ‏ : ‎ 55147


Date First Available ‏ : ‎ May 31, 2018


Manufacturer ‏ : ‎ OASE


Best Sellers Rank: #38,206 in Pet Supplies (See Top 100 in Pet Supplies) #482 in Aquarium Filter Accessories


#482 in Aquarium Filter Accessories:


Customer Reviews: 4.2 4.2 out of 5 stars 108 ratings


Brand: OASE


Special Feature: Hel-x, suspended filter media


Product Dimensions: 9.4"L x 19"W x 9.4"H


Package Information: Box


Installation Type: Freestanding


Power Source: Adapter


Model Name: 55147


UPC: 706759551472


Global Trade Identification Number: 72


Manufacturer: OASE


Item Weight: 13.2 pounds


Item model number: 55147


Date First Available: May 31, 2018


Item Package Dimensions L x W x H: 20 x 14.5 x 11 inches


Item Dimensions LxWxH: 9.4 x 19 x 9.4 inches


Brand Name: OASE


Target Audience Keyword: fish, Fish


Directions: As directed on packaging


Country of Origin: Italy


Warranty Description: 3 year limited + 1 year warranty extension with online registration


Color: Black


Size: 13.23 LBS


Age Range Description: All Life Stages


Number of Items: 1


Style: Biomaster 600


Specific Uses for Product: Indoor


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jun 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • My new favorite!
Style: Biomaster 600
Review Image by Edward Edward
I’m pretty happy with this canister filter so far. It’s very quiet, easy to set up and prime. Mine came with the better pre-filter tube. It’s easy to clean the pre-filter, but from what I see online, it has to be cleaned more often (every one or two weeks) especially if you’re overstocked and have a lot of plants. The good thing is, the rest of the filter stays very clean and doesn’t have to be cleaned for all really long time. I purchased the heater separately to get a cleaner look in my tank. This replaced an older canister that I over tightened and broke one of the plastic screws on. I may stay with this brand if all goes well long term. ... show more
Reviewed in the United States on May 19, 2025 by Edward Edward
    • Silent and Dependable…Did I say it was quite?
Style: Biomaster 600
Review Image by Lou Shoes Lou Shoes
Review Image by Lou Shoes Lou Shoes
Review Image by Lou Shoes Lou Shoes
I bought my first Oase Biomaster 350 for my overcrowded 60 gallon N. Brichardi tank to replace a SunSun that sounded like haybailer I could hear on the other side of the house. The Biomaster had many reviews touting how quiet it was, so I was a buyer. Later, I started a 29 gallon planted tank so of course I went with another Oase Biomaster 350 Thermal this time. When the other SunSun type filter crapped out on the 60 gallon I went with the Biomaster 600. I’ve never been happier with my purchases. I have NO problems with purging or bubbling. The 600 will gas off for maybe ½ an hour after a pre filter cleaning…the two 350’s never purge. All of them just sit there and quietly do their job. I believe that the purging that some others complain about are either operating error such as not getting tight connections on the hoses, not running a coat of Vaseline or silicone grease on the tank o-ring…or a warranty issue (warped lid or bad o-ring IDK?)that Oase should take care of. I also believe aquarist who listen to that foolish Irishman hacking over priced clay or any of the other snake oil biological filters on the market produced to filter the money from your pocket. I am a firm believer that the 30 or 40 ppi sponge that come with the Oase filters is the ultimate biological filter medium. The sponge allows the oxygenated water to flow throughout thus supporting huge amounts of beautiful brown biological mass. Save your money and set the filter up just the way it comes from the factory. The only “pimp” I do to my filters is drill in more holes in the pre-filter tube. I use the fine black Oase pre-filters but have added the big ugly Eheim pre-filters on the intake tubes. The Eheim filters are pretty coarse and do a great job of collecting the big nasty stuff. I clean those out about one every 7 to 10 days and only need to clean the fine Oase pre-filter about once a month. I only crack open the main filters maybe once a year (usually not necessary even that often) for a light swish around in a bucket of tank water and back to work. The biological filtration is beyond belief. Water tests show no ammonia, nitrites, or nitrates. I could really use more nitrates to help the plants but no complaints about that. I’ve had many different aquariums since 1971, running every type of filter from under gravel and the old Metaframe hang on back to now what I consider the ultimate; Oase Biomaster. ... show more
Reviewed in the United States on June 10, 2023 by Lou Shoes Lou Shoes
    • Great Design - Bad Execution
Style: Biomaster 600
The media could not be loaded. The overall design and principle of the unit is phenomenal. The execution of that design leaves a lot to be desired. Pros: Pre-filter. Insanely genius design. Easy to clean and maintain. Cons: Flow rate. Not even close to what is on the packaging. Air purging. Constantly. Somewhere on the system it sucks in air and periodically, every 5 minutes or so, you can hear the filter blowing air. If you rock the filter after a day or so, it has drawn in so much air you have to prime it to get it rolling again. Over all it does the job. Its big and loud however with the air purging. Not sure what Oase is going to do but they have some serious air leaks in the system. This was my first Oase and at this point will be my last. EDIT: In contact with Oase support. I will update once the conversation has concluded. EDIT: OASE Support was less than helpful. Flow rate is still less than desired but the air purging was solved by drilling additional inlet holes in the pre-filter tube. No more purging. None. Upgraded the rating to 4 stars now and I do recommend this filter with the easy modification to the inlet pre-filter tube. ... show more
Reviewed in the United States on March 2, 2022 by Tracie and Scott White
    • K.
Style: Biomaster 600
Bed. After 43 days stop working.
Reviewed in the United States on April 22, 2025 by Karina Laskowska

Can't find a product?

Find it on Amazon first, then paste the link below.