Marineland Magnum Polishing Internal Filter, 97-gal

By Marineland
Rated 3.7344 out of 5 stars
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About This Item

  • The submerged motor allows for quick and easy startup.
  • The two refillable chambers can hold carbon or your filter media of choice.
  • Choose between continuous three-stage filtration or high-efficiency polishing with the included micron cartridge for aquariums up to 97 gallons.
  • Can filter 290 gallons of water per hour.
  • Comes with Marineland’s Black Diamond Premium Activated Carbon and a Marineland Rite-Size JH Floss Sleeve.

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Fish TypeMarine Fish, Tropical FreshwaterTropical Freshwater, Marine FishTropical Freshwater, Betta, Cichlid, Goldfish, Marine FishMarine Invertebrate, Tropical Freshwater, Betta...Tropical Freshwater, Marine Fish
Aquarium TypeSaltwater, FreshwaterFreshwater, SaltwaterFreshwater, SaltwaterFreshwater, SaltwaterFreshwater, Saltwater
MaterialPlasticPlasticPlasticPlastic

Questions & Answers

29 Customer Questions


what would happen if I put this in a 40 gallon tank, this is one of the most affordable filters, but its rated at almost 100 gallons, so would it make the water cloudy?
Answer by ChewyJun 23, 2020
This filter is recommended for aquariums, up to 97 gallons. The filter does not have a flow control, so the flow cannot be increased or decreased. Whether it would be best for your tank will depend on the individual tank. For example, turtle tanks typically need a strong filter while a betta tank would need a slow, gentle flow.

Would this be suitable for turtle tanks? 75 gallon tank, about half to two thirds filled
Answer by ChewyOct 24, 2019
This filter is suitable for turtle tanks. As it is fully submersible, you can locate it anywhere within the tank, as long as your water is deep enough. You would want a depth of at least 12". Customer feedback indicates it works really well for turtles, and is easy to maintain. You have the option of using a blue filter sleeve for mechanical filtration along with carbon for chemical filtration, or using the micron cartridge to polish your water and give it a crystal clear appearance. Customers typically use the carbon and filter sleeve combination for turtles as the micron cartridge may clog too rapidly in a turtle application.

Would this work in a 55 gallon turtle tank as the only filter used?
Answer by ChewyAug 11, 2020
This versatile filter allows you to pick between everyday continuous three-stage filtration or high-efficiency micron water polishing. It’s specially designed to filter aquariums that can hold up to 97 gallons and it can filter 290 gallons of water per hour.

what filter do I need to order for this filter
Answer by ChewySep 30, 2019
This filter includes Marineland’s Black Diamond Premium Activated Carbon and a Marineland Rite-Size JH Floss Sleeve.


ReviewsWrite a Review

3.7
Rated 3.7344 out of 5 stars
64 Reviews
81%
Would recommend to a friend
1
18.75
19%
2
10.9375
11%
3
4.6875
5%
4
9.375
9%
5
56.25
56%

64 Customer Reviews



Rated 1 out of 5 stars
By hhd0259 on Apr 12, 2022

Don't do it...keep searching

Not trying to be dramatic but this thing is making us miserable! Our turtle tank is in back of the living room, next to the kitchen and master bedroom. This filter is SO LOUD that we keep the bedroom door closed constantly, especially when I WFH or I cannot concentrate or make phone calls. We also have to turn up the TV in the living room to hear over it. Then the smell is ridiculous!! I installed it less than 6 wks ago and have had to clean the tank twice since b/c of the smell. Cleaning takes over an hour that I don't have time for! You can smell it in the kitchen which is gross when cooking and smell it in the living room which makes trying to sit and enjoy some family time, challenging. I've had this turtle 7 years and never experienced anything like this. I wish I hadn't shelled out so much money for this one! Can't afford to try another one right yet. Some of the reviews said it was loud...wish I would have listened!


Rated 5 out of 5 stars
By Thea on Feb 9, 2022

Amazing Filter! Powerful and effective.

I purchased this filter recently for my pet turtle in a 50gal tank. It works amazingly! The water was visibly dirty and beginning to get an odor. I thought this would be a good way to test the effectiveness of this product and you wouldn’t believe it but the water was crystal clear and odorless by the next morning! You won’t get a better filter for this price. I highly recommend for other turtle owners but it may be too powerful for fish or small amphibians.


Rated 5 out of 5 stars
By Leee on Feb 15, 2022

Eat filter

It’s the airs test filter I ever had. It’s being used for my 50 gallon tank and it takes about an hour after I put it in to clear the water up! I love it


Rated 5 out of 5 stars
By Emily on Dec 19, 2021

The BEST filter I’ve used

I was pretty skeptical buying this filter as some of the reviews weren’t the best but I’m so glad I did. I keep things simple with just a few goldfish in a 55 gallon tank. Every filter I bought previously NEVER kept the water this clean. I do wish the the current/ filter rate was adjusted as it’s very powerful.


Rated 1 out of 5 stars
By Fishguy on May 19, 2022

Bad Wires caused filter to short out

The insulation fell off the wire and the filter shorted out.


Rated 2 out of 5 stars
By Jose on Dec 27, 2021

Bare minimum

-doesn’t pull water through unless you move it around under the water -it only pulls water at the top half of the filter media so the bottom half is pointless -loud -very strong flow


Rated 5 out of 5 stars
By CayoL on Oct 27, 2021

Great little filter

Worked great on my 170 gallon cattle feeder pond! I know it says up to 97 gallons, but hey it works. I hadn’t been very proactive and let it get cloudy. At first I had to clean the filters after 3 hours and slowly worked up to 8 hour runs. Now the water is very clear, and the koi are happily swimming around. So if you were a inattentive pond owner, with a little patience, this works great.


Rated 5 out of 5 stars
By Shane on Sep 27, 2021

Great polishing filter

I love this filter! Used it after scraping my glass, doing a water change and blowing out my sand. This thing clears the water up in only a couple hours. I would not use this for main filtration because it clogs up fast, but it’s fantastic for clearing up a major issue in a couple hours or overnight.


Rated 5 out of 5 stars
By moonchuddies on Jul 17, 2021

So far it works well

I have been using this filter for about a month now. I have a turtle in a 90 gal aquarium. My aquarium is filled up about 30ish gallons and I have been looking for a filter to take on the bioload. I haven't cleaned the filter yet, but it is extremely powerful and very inexpensive for the power. I would highly recommend it. I didn't want a canister filter because I don't have the aquarium filled up all the way and I seem to break them or they stop working a couple of months within use (when the aquarium is filled up all the way). I needed a filter that could take on three times the amount of water in the tank and also something to keep the water constantly moving, to prevent debris from settling. The filter isn't completely submerged. I turned it upside down and the input and output submerged in the water. You can also add media to the filter which I really liked. It also came with some media, but I need to purchase more. I purchased this filter just to see if it would work and it's worked longer than a lot of the other cheap filters. I am very pleased and pleasantly surprised. I would not recommend this to be in an enclosure with animals that aren't strong swimmers. But otherwise, great product.


Rated 4 out of 5 stars
By jasminetea on Jul 4, 2021

I plan to keep it

I do believe this will work for me. I knocked one star off because it did not come with bio balls (or any kind of bio filter- I am using a sponge until I can get some bio balls) and because the flow is very powerful and cannot be adjusted. I have it in a 55 gallon tank and thought it would be good because over filtration is always better than under filtering. I aimed the flow at the side of the tank, and opened the second opening on the plastic out-flow piece to help reduce the turbulence in the tank. The guppies still get blown around a bit, but they keep coming back for more, so perhaps they are enjoying it? I just hope the babies don't get sucked in. Also, it's not very aesthetically pleasing. If it just didn't have that red stripe on it, being all one color would make it much easier to hide. I plan on building up plants around it, but I'm sure I will always see that bold red stripe.