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OASE BioMaster Thermo 250 External Canister Filter with Built-in Heater Black, Blue

Marsoni M251S
Sale price$172.00
Pay 4 payments of $43.00 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
OASE BioMaster Thermo 250 External Canister Filter with Built-in Heater Black, BlueThe BioMaster Thermo line of premium external filters with integrated heaters are perfect for marine and freshwater aquariums. The BioMaster Thermo 250 boasts 4 stage filtration in a compact design. With the heater integrated into your filter, there is more room for undisrupted beauty in your aquarium. Biological, mechanical, chemical, and prefiltration all work together to provide your aquarium with optimal water quality and clarity. The BioMaster
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.2 ★★★★★
Based on 1291 reviews
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C
Verified Purchase
Charlie L Smith
Massapequa, US
★★★★★ 2
Not so good as expected.
Color: Grey
Pretty poor quality partition. It should hold up to normal indoor ware as long as to don’t touch it. If it is used in a garage (as I did) it will collapse.when subjected to any kind of a breeze at all. I had to reinforce the partition with cross-wires for added support and it was still not enough.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
K
Verified Purchase
Katie Choquette
Battle Creek, US
★★★★★ 4
Functional but not attractive
Color: Black, Color: Black
I purchased this to hide my cats liter boxes as he refuses to use them unless they are on the finished side of our basement which is also my kids play room. This functions as I’d expect. It isn’t great to look at but better than cat boxes. Overall it might make a good backdrop if needed. My only complaint is the hex/allen wrench doesn’t fit in the screws provided. If you don’t have an alternative tool that’s a smaller hex it will be annoying to put together.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2026
S
Verified Purchase
Sarah Johnson
Lake Worth, US
★★★★★ 5
Does the job!
Color: Grey, Color: Grey
This is a great screen to separate a space The base could be a bit sturdier, but for the price, it does the job! I recommend having a mallet for ease of assembly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 9, 2026
Y
Verified Purchase
@Yeapmsb
Phoenix, US
★★★★★ 5
Good
Color: Grey, Color: Grey
The room divider seems to be a great quality. It is easy to assemble and set up. The stability of it is good. It doesn’t knock over easily. I use it when I have company over to divide a room to give them privacy. I might also use it on my patio to keep the wind And cold air while I sit and enjoy outside.
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Reviewed in the United States on December 19, 2025
D
Verified Purchase
Dustin Parvin
Dallas, US
★★★★★ 1
Worse Divider Ever.
Color: Grey
Most complicated thing I have ever attempted to put together. Not worth the price.
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Reviewed in the United States on April 15, 2026

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