Oase BioMaster 350 Canister Filter
OASE_BIOMASTER_250_350
Selected variant: the OASE BioMaster 350 (BioMaster 2 350, the current generation). It is an external canister filter with a four-stage sealed filtration system and an EasyClean pre-filter module that...
Or build it into a bundle — save up to 6% ↓What it is, and who it is for.
Selected variant: the OASE BioMaster 350 (BioMaster 2 350, the current generation). It is an external canister filter with a four-stage sealed filtration system and an EasyClean pre-filter module that can be removed and serviced separately to reduce maintenance and prolong foam life. It is designed for freshwater and saltwater aquariums up to roughly 90 gallons (350 L), with optional HeatUp heater integration.
Build around the Oase BioMaster 350 Canister Filter.
It's already in your system below. Add the flow, filtration and dosing around it and the discount starts working — tiers climb as the build grows, and the reef meter fills with it.
Pick the right one, not the biggest one
The honest line-up from canister filters. Most buyers reading this page should buy the middle column.
Eheim Classic 350 Canister Filter
Oase BioMaster 350 Canister Filter
Oase BioMaster Thermo 350 Canister FilterAsked before checkout
The questions our support inbox actually gets.
Does it ship quickly?+
Orders placed before 2 PM ET on a business day leave the same day. Tracking is emailed the moment the label prints.
What if it's the wrong fit for my tank?+
Return it. 30 days, no restocking fee, refund to the original payment method. Better: tell us your tank first and we'll spec the system for free — half of all returns are sizing problems.
Who handles the warranty?+
We do. Everything carries the manufacturer's warranty and we run the claim for you — one email to us instead of a ticket queue.
How does the bundle discount work?+
Add items in the bundle builder: 2+ items saves 5%, 3+ saves 8%, 4+ saves 12%, and 5+ saves 15% off the whole system, applied at checkout.