Magnum® Polishing Internal Canister Filter

Product No. ML90770
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The Marineland® Magnum® Polishing Internal Canister Filter uses two refillable chambers to house carbon or customizable filter media. The Magnum Polishing Internal Canister Filter is the most versatile filter Marineland has to offer. Choose from every day, continuous three stage filtration or high efficiency polishing with the included micron cartridge. The submerged motor means quick and easy start up, no priming necessary! The Marineland Magnum Polishing Internal Canister Filter filters 290 gallons per hour and is ideal for aquariums up to 97 gallons.
Magnum® Polishing Internal Canister Filter is rated 4.1 out of 5 by 14.
Rated 5 out of 5 by from Great Polishing Filter! Purchased the filter from Petco , easy to assemble. I'm using it to polish my water in my 72 gallon bow front tank . Has a strong output flow , seems to work well .
Date published: 2017-07-21
Rated 3 out of 5 by from Works fabulous.... for awhile. I bought this product about a month and a half ago. I placed it into my planted aquarium with ease and used the carbon filter and it helped maintain the water quality and my tank was picture perfect. Cleaning the filter was the easiest part and I fell in love! Usually with normal filters and canisters it's a pain, too many cords&bulky parts. However, while cleaning the filter for the 3rd or 4th time since having it the part which holds the carbon snapped and broke way too easily and my O ring was broken in half. I was extremely bummed that I now had to switch to the polishing filter that doesn't run as well at all. I paid about 80 dollars for this filter at my local pet store and was over joyed with the product till everything seemed to break and start to lag. I suppose luck may have something to do with it. This product can be great.
Date published: 2017-07-16
Rated 5 out of 5 by from The best filter for my 65g acrylic Aquarium I replaced a HOB and a UV Sterilizer within Magnum filtration system and I love it I just wished MarineLand would make this filter for Aquariums less than 20g as I have a 15g heavily planted tank with a external MarineLand C series filter
Date published: 2017-07-02
Rated 5 out of 5 by from It really works! Over the 20 years I have had a number of different filters and the Magnum Polishing internal canister filter is the absolute best. I was having an algae problem when I bought this system. I had to clean the filter once a week at first because of the algae filling up the canister. ( I now clean the filter once a month as part of water changes). However, the water was crystal clear in my 45 gallon marine tank with in an hour and has remained that way every since. The funny part is that I did not realize my water was not clear. What an amazing difference this system has made in my tank. I would buy this system again and highly recommend it to any one that has an aquarium. I have had no problems and it is very quiet. I have left my larger system in place and will continue to use both at the same time.
Date published: 2017-05-11
Rated 1 out of 5 by from Lots of flow issues I have had this filter for 2 days. I planed to use it to help fight an algae bloom i'm having and used the media container for a phosphate sponge. Ran great for a few hours then the flow rate dropped to near nothing. I took it apart and cleaned it nothing, was clogging the intake or the impeller the filter sleeve it self did not even look particularly soiled. Ran it again for about 20 min and it went back to the same super low flow rate. Next i used the polish filter and it worked for a few hours the same issue. I tried to clean out the filters and they look almost new however it still moves so little water it cannot be that effective. If i run the pump in a bucket alone its fine so clearly the issue is the filters... however after a few hours of work in a 75gal tank this seems to pretty unreasonable. I would avoid this for any larger aquarium types. Summery: I would avoid this. To easy to clog up and takes constant maintenance on a larger tank. Would only recommend using for tanks no later than 40 gal.
Date published: 2017-03-02
Rated 5 out of 5 by from Unbelievable results Having the 38 gallon bow front kit, the marineland bio wheel 200 HOB is sub par for this set up, added this canister finally took the haze out if the water, I now pretty much use the bio wheel as a holder gir mh ceramic rings with just a pre cut piece of media in front, and use the canister as my main filter. Controlling the flow problematic but with some proper position have jt jusg right. So wish they would make a flow control. But other than that it us a awesome filter/polisher tank is now crysral clear water parameters are all perfect now we can populate the tank.
Date published: 2017-01-20
Rated 3 out of 5 by from Stopped pumping Output of water fail Took it thoroughly apart and cleaned and still not pumping really at all
Date published: 2017-01-07
Rated 1 out of 5 by from Blowing bubbles I bought this filter about a month ago and it's blowing bubbles bad. In a reef tank that is not good. I've used 2 hot 250's years ago and loved them. They kept the water crystal clear. Not loving the 290 how do I make it stop blowing bubbles.
Date published: 2016-12-30
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I just bought this filter and installed. Its making a crackling noise and the outlet does not produce any bubbles. I just see ripples on the top layer of water. Is this normal? Should it not pump water out with bubbles?

Asked by: Kishore Prasad
It will not produce bubbles unless you add a venturi to it, which is an optional item, and sold separately. Pull the impeller out of the powerhead and re-seat it to stop the crackling noise, if it doesn't stop on its own in a few hours. BREX
Answered by: BREX
Date published: 2017-08-16

I can not get clear water. I am also confused as to where the foam gasket goes. The strainer as well. Is there a video available to assemble this filter?

Asked by: kwhitley
Hi kwhitely! We sure do have a video available! Check it out here: https://youtu.be/4ToxWSkx3uc
Answered by: Customer Service
Date published: 2017-08-08

Is this suitable for a 10 gallon freshwater tank.?

Asked by: Straya9817
This would be too large, and would probably blow the fish right out of a ten gallon tank, unfortunately. :-) BREX
Answered by: BREX
Date published: 2017-08-01

I am planning to buy the internal canister filter and bring it to India. For the power supply, what voltage range does it support, 110V only? or do I need to use a step down voltage transformer in India, as India supports only 220V to 240V?

Asked by: Kishore Prasad
110V only. BREX
Answered by: BREX
Date published: 2017-07-31

Can this be mounted horizontal? Was going to use in my 30 gallon cray/shrimp tank. Thanks

Asked by: DiscusnRI
No, must be vertical. BREX
Answered by: BREX
Date published: 2017-08-18

Could I use this on its side?

Asked by: Jmattin52
No, it must be upright to work correctly. BREX
Answered by: BREX
Date published: 2017-08-18

The part that holds carbon completely broke when I was rinsing it and my O ring snapped in half as well. I was wondering if there are any replacement parts?

Asked by: Zoepug38
Yes, it takes the same media container and the same o ring as the HOT Magnum did. http://www.marineland.com/search.aspx?q=hot%20magnum#/?filter.brand=Marineland BREX
Answered by: BREX
Date published: 2017-07-18

How often should I change the carbon charcoal?

Asked by: Anonymous
Once a month at least. BREX
Answered by: BREX
Date published: 2017-07-18
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ML90770 - 97gal/290 GPH