Marineland Magnum Polishing Internal Canister Filter
- Up to 97 gallons
- 290 gallons per hour
- Submerged motor
- Two refillable chambers
- Micron cartridge included for polishing
- Three-stage filtration
Last refreshed Jul 1, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
Marineland's internal canister polishes water to high clarity and mounts inside the tank, so there are no external hoses. It takes up space in the aquarium.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B01C8PH0OICategory: Aquarium Filters
Overview
Marineland built the Magnum as an internal canister that mounts in the tank with a submerged motor. Two refillable chambers take carbon or your own media, and a micron cartridge polishes fine particles for very clear water.
Owners get water polishing without plumbing an external canister, along with refillable chambers for custom media. Because it lives inside the tank, it occupies swimming space and is visible unless hidden by decor.
Who it's for
Owners who need crystal clear water for display tanks or quarantine setups will value the micron polishing. Aquascapers who hide all equipment should choose an external canister.
Pros and cons
- Micron polishing cartridge
- No external hoses
- Refillable media chambers
- Three filtration stages
- Takes space inside the tank
- Visible in the display
- Micron cartridge needs regular rinsing
Performance notes
Clarity comes from the micron cartridge trapping very fine particles, which clogs faster and needs frequent cleaning. Flow from the submerged motor circulates the tank without priming. Chemical filtration depends on what you load in the chambers.
Specifications
| Brand | Marineland |
|---|---|
| Capacity & performance | |
| Tank capacity | Up to 97 gallons |
| Flow Rate | 290 gallons per hour |
| Included components | |
| Included Components | Micron cartridge |
| Other details | |
| Filter type | Internal canister |
| Filtration stages | Three-stage |
| Media chambers | Two refillable |
| FOR AQUARIUMS UP TO 97 GALLONS | Capable of filtering 290 gallons of water per hour. |
| INTERNAL CANISTER FILTER | Submerged motor for quick and easy startup. |
Frequently asked questions
How do I maintain the Marineland Magnum polishing cartridge?
The listing gives no cleaning schedule. The micron cartridge handles fine polishing and is included; refill the two chambers with carbon or other media as needed.
Is it an external canister?
No. It is an internal canister with a submerged motor.
How much flow does it have?
290 gallons of water per hour.
Can I add my own media?
Yes. Two refillable chambers house carbon or customizable media.